Volume 15,
Number 1,
January 1989
 Program Verification 
- D. Sarkar, S. C. De Sarkar:
Some Inference Rules for Integer Arithmetic for Verification of Flowchart Programs on Integers.
1-9
  
 
 
 
 
 
Distributed Systems 
Databases 
Algorithms 
Volume 15,
Number 2,
February 1989
 
- Pasquale Armenise:
A Structured Approach to Program Optimization.
101-108
  
 
 
 
 
 - Tarek K. Abdel-Hamid:
The Dynamics of Software Project Staffing: A System Dynamics Based Simulation Approach.
109-119
  
 
 
 
 
 - K. K. Ramakrishnan, Joel S. Emer:
Performance Analysis of Mass Storage Service Alternatives for Distributed Systems.
120-133
  
 
 
 
 
 - David M. Nicol:
Optimal Partitioning of Random Programs Across two Processors.
134-141
  
 
 
 
 
 - Bipin C. Desai:
Performance of a Composite Attribute and Join Index.
142-152
  
 
 
 
 
 - Stefano Ceri, Georg Gottlob, Gio Wiederhold:
Efficient Database Access from Prolog.
153-164
  
 
 
 
 
 - Friedrich L. Bauer, Bernhard Möller, Helmuth Partsch, Peter Pepper:
Formal Program Construction by Transformations-Computer-Aided, Intuition-Guided Programming.
165-180
  
 
 
 
 
 - Jeannette M. Wing, Mark R. Nixon:
Extending Ina Jo with Temporal Logic.
181-197
  
 
 
 
 
 - Martin S. Feather:
Constructing Specifications by Combining Parallel Elaborations.
198-208
  
 
 
 
 
 - George Peterka, Tadao Murata:
Proof Procedure and Answer Extraction in Petri Net Model of Logic Programs.
209-217
  
 
 
 
 
 - David B. Brown, Saeed Maghsoodloo, William H. Deason:
A Cost Model for Determining the Optimal Number of Software Test Cases.
218-221
  
 
 
 
 
 - David B. Skillicorn, Janice I. Glasgow:
Real-Time Specification Using Lucid.
221-229
  
 
 
 
 
 
Volume 15,
Number 3,
March 1989
 
- Raymond J. A. Buhr, Gerald M. Karam, Carol J. Hayes, C. Murray Woodside:
Software CAD: A Revolutionary Approach.
235-249
  
 
 
 
 
 - Alexander L. Wolf, Lori A. Clarke, Jack C. Wileden:
The AdaPIC Tool Set: Supporting Interface Control and Analysis Throughout the Software Development Process.
250-263
  
 
 
 
 
 - Pankaj Jalote:
Functional Refinement and Nested Objects for Object-Oriented Design.
264-270
  
 
 
 
 
 - Rakesh Jha, J. Michael Kamrad II, Dennis T. Cornhill:
Ada Program Partitioning Language: A Notation for Distributing Ada Programs.
271-280
  
 
 
 
 
 - Richard A. Volz, Trevor N. Mudge, Gregory D. Buzzard, Padmanabhan Krishnan:
Translation and Execution of Distributed Ada Programs: Is It Still Ada?
281-292
  
 
 
 
 
 - Anne F. Brindle, Richard N. Taylor, David F. Martin:
A Debugger for Ada Tasking.
293-304
  
 
 
 
 
 - Michael B. Feldman, Melinda L. Moran:
Validating a Demonstration Tool for Graphics-Assisted Debugging of Ada Concurrent Programs.
305-313
  
 
 
 
 
 - Tadao Murata, Boris Shenker, Sol M. Shatz:
Detection of Ada Static Deadlocks Using Petri Net Invariants.
314-326
  
 
 
 
 
 - Lionel M. Ni, Ching-Farn Eric Wu:
Design Tradeoffs for Process Scheduling in Shared Memory Multiprocessor Systems.
327-334
  
 
 
 
 
 - Robert F. Cmelik, Narain H. Gehani, William D. Roome:
Experience with Multiple Processor Versions of Concurrent C.
335-344
  
 
 
 
 
 - Yoshihiro Tohma, Kenshin Tokunaga, Shinji Nagase, Yukihisa Murata:
Structural Approach to the Estimation of the Number of Residual Software Faults Based on the Hyper-Geometric Distribution.
345-355
  
 
 
 
 
 - Alfonso Fuggetta, Carlo Ghezzi, Dino Mandrioli:
Some Consideration on Real-Time Bahavior of Concurrent Programs.
356-359
  
 
 
 
 
 - Bo Sanden:
The Case for Electric Design of Real-Time Software.
360-362
  
 
 
 
 
,
Correction:
TSE 15(7):
926 (1989) 
 
Volume 15,
Number 4,
April 1989
 
- Gerard Florin, Stéphane Natkin:
Necessary and Sufficient Ergodicity Condition for Open Synchronized Queueing Networks.
367-380
  
 
 
 
 
 - Peter J. Haas, Gerald S. Shedler:
Stochastic Petri Net Representation of Discrete Event Simulations.
381-393
  
 
 
 
 
 - Joanne Bechta Dugan, Gianfranco Ciardo:
Stochastic Petri Net Analysis of a Replicated File System.
394-401
  
 
 
 
 
 - Norman F. Schneidewind:
Distributed System Software Design Paradigm with Application to Computer Networks.
402-412
  
 
 
 
 
 - Deepinder P. Sidhu, Ting-Kau Leung:
Formal Methods for Protocol Testing: A Detailed Study.
413-426
  
 
 
 
 
 - Mark A. Linton, Russell W. Quong:
A Macroscopic Profile of Program Compilation and Linking.
427-436
  
 
 
 
 
 - Daniel M. Dias, Balakrishna R. Iyer, John T. Robinson, Philip S. Yu:
Integrated Concurrency-Coherency Controls for Multisystem Data Sharing.
437-448
  
 
 
 
 
 - James A. Larson, Shamkant B. Navathe, Ramez Elmasri:
A Theory of Attribute Equivalence in Databases with Application to Schema Integration.
449-463
  
 
 
 
 
 - Abdullah Uz Tansel, M. Erol Arkun, Gultekin Özsoyoglu:
Time-by-Example Query Language for Historical Databases.
464-478
  
 
 
 
 
 - Asuman Dogac, Birol Yürüten, Stefano Spaccapietra:
A Generalized Expert System for Database Design.
479-491
  
 
 
 
 
 - Mustaque Ahamad, Mostafa H. Ammar:
Performance Characterization of Quorum-Consensus Algorithms for Replicated Data.
492-501
  
 
 
 
 
 
Volume 15,
Number 5,
May 1989
 
- Shi-Kuo Chang, Michael J. Tauber, Bing Yu, Jing-Sheng Yu:
A Visual Language Compiler.
506-525
  
 
 
 
 
 - Pankaj Jalote:
Testing the Completeness of Specifications.
526-531
  
 
 
 
 
 - Brent Hailpern, Tien Huynh, György E. Révész:
Comparing Two Functional Programming Systems.
532-542
  
 
 
 
 
 - Wade H. Shaw Jr., James W. Howatt, Robert S. Maness, Dennis M. Miller:
A Software Science Model of Compile Time.
543-549
  
 
 
 
 
 - Harlan D. Mills, Victor R. Basili, John D. Gannon, Richard G. Hamlet:
Mathematical Principles for a First Course in Software Engineering.
550-559
  
 
 
 
 
 - R. T. Jacob, Ivor P. Page:
Synthesis of Mutual Exclusion Solutions Based on Binary Semaphores.
560-568
  
 
 
 
 
 - Patrick M. Lenders:
Distributed Computing with Single Read-Single Write Variables.
569-574
  
 
 
 
 
 - Wo-Shun Luk, Franky Ling:
An Analytic/Empirical Study of Distributed Sorting on a Local Area Network.
575-586
  
 
 
 
 
 - Zhiwei Xu, Kai Hwang:
Molecule: A Language Construct for Layered Development of Parallel Programs.
587-599
  
 
 
 
 
 - Sakti P. Ghosh:
Numerical Operations on a Relational Database.
600-610
  
 
 
 
 
 - Geoff Barrett:
Formal Methods Applied to a Floating-Point Number System.
611-621
  
 
 
 
 
 - Jean-Loup Baer, Yi-Bing Lin:
Improving Quicksort Performance with a Codewort Data Structure.
622-631
  
 
 
 
 
 - Donald A. Varvel, Leonard D. Shapiro:
The Computational Completeness of Extended Database Query Languages.
632-638
  
 
 
 
 
 - K. B. Lakshmanan, Krishnaiyan Thulasiraman, M. A. Comeau:
An Efficient Distributed Protocol for Finding Shortest Paths in Networks with Negative Weights.
639-644
  
 
 
 
 
 - Israel Cidon:
An Efficient Distributed Knot Detection Algorithm.
644-649
  
 
 
 
 
 - Randy K. Lind, K. Vairavan:
An Experimental Investigation of Software Metrics and Their Relationship to Software Development Effort.
649-653
  
 
 
 
 
 - Luigi Ciminiera, Adriano Valenzano:
Authentication Mechanisms in Microprocessor-Based Local Area Networks.
654-658
  
 
 
 
 
 - Jie Wu, Eduardo B. Fernández:
A Simplification of a Conversation Design Scheme Using Petri Nets.
658-660
  
 
 
 
 
 
Volume 15,
Number 6,
June 1989
 
- Jeff Magee, Jeff Kramer, Morris Sloman:
Constructing Distributed Systems in Conic.
663-675
  
 
 
 
 
 - Raphael A. Finkel, Michael L. Scott, Yeshayahu Artsy, Hung-Yang Chang:
Experience with Charlotte: Simplicity and Function in a Distributed Operating System.
676-685
  
 
 
 
 
 - Anand Tripathi:
An Overview of the Nexus Distributed Operating System Design.
686-695
  
 
 
 
 
 - Ming-Yee Lai, W. Kevin Wilkinson, Vladimir Lanin:
On Distributing JASMIN's Optimistic Multiversioning Page Manager.
696-704
  
 
 
 
 
 - Akhil Kumar, Michael Stonebraker:
Performance Considerations for an Operating System Transaction Manager.
705-714
  
 
 
 
 
 - K. H. Kim:
An Approach to Experimental Evaluation of Real-Time Fault-Tolerant Distributed Computing Schemes.
715-725
  
 
 
 
 
 - Bharat K. Bhargava, John Riedl:
The Raid Distributed Database System.
726-736
  
 
 
 
 
 - Steven J. Zeil:
Perturbation Techniques for Detecting Domain Errors.
737-746
  
 
 
 
 
 - Connie Loggia Ramsey, Victor R. Basili:
An Evaluation of Expert Systems for Software Engineering Management.
747-759
  
 
 
 
 
 - Chao-Chih Yang, Jennifer Jau-Yin Chen, H. Lewis Chau:
Algorithms for Constructing Minimal Deduction Graphs.
760-770
  
 
 
 
 
 - Bharat Jayaraman, Gopal Gupta:
EqL: The Language and Its Implementation.
771-779
  
 
 
 
 
 - Clement T. Yu, Keh-Chang Guh, David Brill, Arbee L. P. Chen:
Partition Strategy for Distributed Query Processing in Fast Local Networks.
780-793
  
 
 
 
 
 - Yannis Manolopoulos, John G. Kollias:
Expressions for Completely and Partly Unsuccessful Batched Search of Sequential and Tree-Structured Files.
794-799
  
 
 
 
 
 - Raif O. Onvural, Harry G. Perros:
Approximate Throughput Analysis of Cyclic Queueing Networks with Finite Buffers.
800-808
  
 
 
 
 
 - Hany H. Ammar, S. M. Rezaul Islam:
Time Scale Decomposition of a Class of Generalized Stochastic Petri Net Models.
809-820
  
 
 
 
 
 - Cathy May:
The Parallel Assignment Problem Redefined.
821-824
  
 
 
 
 
 
Volume 15,
Number 7,
July 1989
 
- Maurice Herlihy, Martin S. McKendry:
Timestamp-Based Orphan Elimination.
825-831
  
 
 
 
 
 - Marco Ajmone Marsan, Gianfranco Balbo, Andrea Bobbio, Giovanni Chiola, Gianni Conte, Aldo Cumani:
The Effect of Execution Policies on the Semantics and Analysis of Stochastic Petri Nets.
832-846
  
 
 
 
 
 - Riccardo Gusella, Stefano Zatti:
The Accuracy of the Clock Synchronization Achieved by TEMPO in Berkeley UNIX 4.3BSD.
847-853
  
 
 
 
 
 - Joel L. Wolf, Daniel M. Dias, Balakrishna R. Iyer, Philip S. Yu:
Multisystem Coupling by a Combination of Data Sharing and Data Partitioning.
854-860
  
 
 
 
 
 - Behrokh Samadi:
TUNEX: A Knowledge-Based System for Performance Tuning of the UNIX Operating System.
861-874
  
 
 
 
 
 - Alan C. Shaw:
Reasoning About Time in Higher-Level Language Software.
875-889
  
 
 
 
 
 - Beatrice Lazzerini, Lanfranco Lopriore:
Abstraction Mechanisms for Event Control in Program Debugging.
890-901
  
 
 
 
 
 - Barry W. Boehm, Rony Ross:
Theory-W Software Project Management: Principles and Examples.
902-916
  
 
 
 
 
 - Lutz Michael Wegner, Jukka Teuhola:
The External Heapsort.
917-925
  
 
 
 
 
 - Liu Lingzhong:
Comments on ``A Distributed Scheme for Detecting Communication Deadlocks''.
926
  
 
 
 
 
 - Bo Sanden:
Correction to ``The Case for Electric Design of Real-Time Software''.
926
  
 
 
 
 
,
-> TSE 15(3):
360-362 (1989) 
 
Volume 15,
Number 8,
August 1989
 
- Guang-Huei Chiou, Wen-Tsuen Chen:
Secure Broadcasting Using the Secure Lock.
929-934
  
 
 
 
 
 - Stephen P. Hufnagel, James C. Browne:
Performance Properties of Vertically Partitioned Object-Oriented Systems.
935-946
  
 
 
 
 
 - Michael L. Fontenot:
Software Congestion, Mobile Servers, and the Hyperbolic Model.
947-962
  
 
 
 
 
 - Shyh-Kwei Chen, Wei-Tek Tsai, Bhavani M. Thuraisingham:
Recovery Point Selection on a Reverse Binary Tree Task Model.
963-976
  
 
 
 
 
 - R. K. Shyamasundar, James W. Thatcher:
Language Constructs for Specifying Concurrency in CDL*.
977-993
  
 
 
 
 
 - Ugur Halici, Asuman Dogac:
Concurrency Control in Distributed Databases Through Time Intervals and Short-Term Locks.
994-1003
  
 
 
 
 
 - Douglas W. Cornell, Philip S. Yu:
On Optimal Site Assignment for Relations in the Distributed Database Environment.
1004-1009
  
 
 
 
 
 - Jun-Ichi Aoe:
An Efficient Implementation of Static String Pattern Matching Machines.
1010-1016
  
 
 
 
 
 - Andrew Kusiak, Sunderesh S. Heragu:
Expert Systems and Optimization.
1017-1020
  
 
 
 
 
 
Volume 15,
Number 9,
September 1989
 
- Chi Y. Lin, Reuven R. Levary:
Computer-Aided Software Development Process Design.
1025-1037
  
 
 
 
 
 - Gultekin Özsoyoglu, Huaqing Wang:
A Relational Calculus with Set Operators, Its Safety and Equivalent Graphical Languages.
1038-1052
  
 
 
 
 
 - Rajive Bagrodia:
Process Synchronization: Design and Performance Evaluation of Distributed Algorithms.
1053-1065
  
 
 
 
 
 - Jun-Ichi Aoe:
An Efficient Digital Search Algorithm by Using a Double-Array Structure.
1066-1077
  
 
 
 
 
 - Joshua Etkin, John A. Zinky:
Development Life Cycle of Computer Networks: The Executable Model Approach.
1078-1089
  
 
 
 
 
 - Sandra A. Mamrak, Michael J. Kaelbling, Charles K. Nicholas, Michael Share:
Chameleon: A System for Solving the Data-Translation Problem.
1090-1108
  
 
 
 
 
 - Daniel Troy, Clement T. Yu, Weining Zhang:
Linearization of Nonlinear Recursive Rules.
1109-1119
  
 
 
 
 
 - Ashok Malhotra, Harry M. Markowitz, Yakov Tsalalikhin, Donald P. Pazel, Luanne M. Burns:
An Entity Relationship Programming Language.
1120-1130
  
 
 
 
 
 - John A. Lehman:
An Empirical Comparison of Textual and Graphical Data Structure Documentation for Cobol Programs.
1131-1135
  
 
 
 
 
 - Chi-Sung Laih, Lein Harn, Jau-Yien Lee:
On the Design of a Single-Key-Lock Mechanism Based on Newton's Interpolating Polynomial.
1135-1137
  
 
 
 
 
 
Volume 15,
Number 10,
October 1989
 
- Kazuo Sugihara, Tohru Kikuno, Noriyoshi Yoshida:
A Meeting Scheduler for Office Automation.
1141-1146
  
 
 
 
 
 - Alexander Thomasian, In Kyung Ryu:
A Recursive Solution Method to Analyze the Performance of Static Locking Systems.
1147-1156
  
 
 
 
 
 - Sang Hyuk Son, Ashok K. Agrawala:
Distributed Checkpointing for Globally Consistent States of Databases.
1157-1167
  
 
 
 
 
 - Xian-He Sun, Nabil Kamel, Lionel M. Ni:
Processing Implication on Queries.
1168-1175
  
 
 
 
 
 - David Chenho Kung:
Conceptual Modeling in the Context of Software Development.
1176-1187
  
 
 
 
 
 - Kang G. Shin, C. Mani Krishna, Yann-Hang Lee:
Optimal Dynamic Control of Resources in a Distributed System.
1188-1198
  
 
 
 
 
 - Rajiv D. Banker, Chris F. Kemerer:
Scale Economies in New Software Development.
1199-1205
  
 
 
 
 
 - Simonetta Balsamo, Lorenzo Donatiello:
On the Cycle Time Distribution in a Two-Stage Cyclic Network with Blocking.
1206-1216
  
 
 
 
 
 - Paolo Ciaccia, Maria Rita Scalas:
Optimization Strategies for Relational Disjunctive Queries.
1217-1235
  
 
 
 
 
 - Manfred Ruschitzka, John L. Clevenger:
Heterogeneous Data Translations Based on Environment Grammars.
1236-1251
  
 
 
 
 
 - Wei-Chung Hsu, Charles N. Fischer, James R. Goodman:
On the Minimization of Loads/Stores in Local Register Allocation.
1252-1260
  
 
 
 
 
 - Houssine Chetto, Maryline Silly-Chetto:
Some Results of the Earliest Deadline Scheduling Algorithm.
1261-1269
  
 
 
 
 
 - Venkatraman R. Iyer, Howard A. Sholl:
Software Partitioning for Distributed, Sequential, Pipelined Applications.
1270-1279
  
 
 
 
 
 - Lung-Chun Liu, Ellis Horowitz:
A Formal Model for Software Project Management.
1280-1293
  
 
 
 
 
 - David B. Bisant, James R. Lyle:
A Two-Person Inspection Method to Improve Programming Productivity.
1294-1304
  
 
 
 
 
 - Ian F. Akyildiz, Horst von Brand:
Central Server Models with Multiple Job Classes, State Dependent Routing, and Rejection Blocking.
1305-1312
  
 
 
 
 
 
Volume 15,
Number 11,
November 1989
 
- Lori A. Clarke, Andy Podgurski, Debra J. Richardson, Steven J. Zeil:
A Formal Evaluation of Data Flow Path Selection Criteria.
1318-1332
  
 
 
 
 
 - Karen Shannon, Richard T. Snodgrass:
Mapping the Interface Description Language Type Model into C.
1333-1346
  
 
 
 
 
 - Gregor von Bochmann, Rachida Dssouli, J. R. Zhao:
Trace Analysis for Conformance and Arbitration Testing.
1347-1356
  
 
 
 
 
 - Jai Prakash Gupta, Stephen C. Winter, Derek R. Wilson:
CTDNet-A Mechanism for the Concurrent Execution of Lambda Graphs.
1357-1367
  
 
 
 
 
 - D. Sarkar, S. C. De Sarkar:
A Set of Inference Rules for Quantified Formula Handling and Array Handling in Verification of Programs Over Integers.
1368-1381
  
 
 
 
 
 - William R. Bevier:
Kit: A Study in Operating System Verification.
1382-1396
  
 
 
 
 
 - Harold Ossher:
A Case Study in Structure Specification: A Grid Description of Scribe.
1397-1416
  
 
 
 
 
 - Michael Evangelist, Nissim Francez, Shmuel Katz:
Multiparty Interactions for Interprocess Communication and Synchronization.
1417-1426
  
 
 
 
 
 - David Fernández-Baca:
Allocating Modules to Processors in a Distributed System.
1427-1436
  
 
 
 
 
 - T. H. Merrett, Normand Laliberte:
Including Scalars in a Programming Language Based on the Relational Algebra.
1437-1443
  
 
 
 
 
 - Marvin Theimer, Keith A. Lantz:
Finding Idle Machines in a Workstation-Based Distributed System.
1444-1458
  
 
 
 
 
 - Anna Hac:
A Distributed Algorithm for Performance Improvement Through File Replication, File Migration, and Process Migration.
1459-1470
  
 
 
 
 
 - Gerald M. Karam, Christine M. Stanczyk, Gregory W. Bond:
Critical Races in Ada Programs.
1471-1480
  
 
 
 
 
 - Susan S. Brilliant, John C. Knight, Nancy G. Leveson:
The Consistent Comparison Problem in N-Version Software.
1481-1485
  
 
 
 
 
 - Harry Joe:
Statistical Inference for General-Order-Statistics and Nonhomogeneous-Poisson-Process Software Reliability Models.
1485-1490
  
 
 
 
 
 - Anthony Chung, Deepinder P. Sidhu:
On Conditions for Defining a Closed Cover to Verify Progress for Communicating Finite State Machines.
1491-1494
  
 
 
 
 
 
Volume 15,
Number 12,
December 1989
 
- Michael L. Dertouzos, Aloysius K. Mok:
Multiprocessor On-Line Scheduling of Hard-Real-Time Tasks.
1497-1506
  
 
 
 
 
 - Norman R. Howes, Alfred C. Weaver:
Measurements of Ada Overhead in OSI-Style Communications Systems.
1507-1517
  
 
 
 
 
 - Ravi S. Sandhu:
Recognizing Immediacy in an N-Tree Hierarchy and Its Application to Protection Groups.
1518-1525
  
 
 
 
 
 - Wael Hilal Bahaa-El-Din, Farokh B. Bastani, Ju-En Teng:
Performance Analysis of Periodic and Concurrent Data Structure Maintenance Strategies for Network Servers.
1526-1536
  
 
 
 
 
 - Lori L. Pollock, Mary Lou Soffa:
An Incremental Version of Iterative Data Flow Analysis.
1537-1549
  
 
 
 
 
 - D. Sarkar, S. C. De Sarkar:
A Theorem Prover for Verifying Iterative Programs Over Integers.
1550-1566
  
 
 
 
 
 - Guy Bernard, Andrzej Duda, Yoram Haddad, Gilbert Harrus:
Primitives for Distributed Computing in a Heterogeneous Local Area Network Environment.
1567-1578
  
 
 
 
 
 - Murthy V. Devarakonda, Ravishankar K. Iyer:
Predictability of Process Resource Usage: A Measurement-Based Study on UNIX.
1579-1586
  
 
 
 
 
 - Barbara E. Wójcik, Zbigniew M. Wójcik:
Sufficient Condition for a Communication Deadlock and Distributed Deadlock Detection.
1587-1595
  
 
 
 
 
 - Bev Littlewood, Douglas R. Miller:
Conceptual Modeling of Coincident Failures in Multiversion Software.
1596-1614
  
 
 
 
 
 - Cui-Qing Yang, Barton P. Miller:
Performance Measurement for Parallel and Distributed Programs: A Structured and Automatic Approach.
1615-1629
  
 
 
 
 
 - Leonardo Felician, Graziella Zalateu:
Validating Halstead's Theory for Pascal Programs.
1630-1632
  
 
 
 
 
 - Shyamal K. Chowdhury:
The Mean Resequencing Delay for M/H_K/infty Systems.
1633-1638
  
 
 
 
 
 - James A. Hager:
Software Cost Reduction Methods in Practice.
1638-1644
  
 
 
 
 
 - Alok N. Choudhary, Walter H. Kohler, John A. Stankovic, Donald F. Towsley:
Correction to ``A Modified Priority Based Probe Algorithm for Distributed Deadlock Detection and Resolution''.
1644
  
 
 
 
 
,
->TSE 15(1):
10-17 (1989) 
 
Copyright © Fri Mar 12 17:34:07 2010
 by Michael Ley (ley@uni-trier.de)