Visualisation and Courseware Design for Educational Software Portability. Third East/West Seminar on New Information Technologies in Education, August 1991, Prague, Czechoslovakia.
Managing Interactive Video/Multimedia Projects. Workshop. June 1991.
Computers and Prestroika in Bulgaria. International Track "The Impact of Computer Technology on Culture", 32nd ADCIS Conference, November 1990, San Diego, USA.
Visual Presentation of Information and Design of Interactive Screens. International Conference VIDEOCOMP'90, September 1990, Varna, Bulgaria.
Organisational Aspects of DSS-Integration. International Workshop on Multiple Criteria Decision Support, August 1989, Helsinki, Finland.
MCDM and MDS, or the Bridge between Analytical and Cognitive Decision Models, EURO X, June 1989, Belgrad.
Probleme der Zielformulierung und - erf?llung im Entscheidungs Prozess. Vortrag zu Jahrestagung der DDR Gruppe f?r Mehrkriterielle Entscheidung und Entscheidungsunterst?tzungssysteme. Dezember 1988, Berlin.
The Revival of the Process of Operational Research, First Balkan Conference on Operational Research, October 1988, Thessaloniki, Greece.
DSS-ES Integration Problems, Multi-objective Problems of Mathematical Programming, Yalta, USSR, 1988.
Decisions and their Support, Managerial Decision Support Systems and Knowledge-Based Systems, November 1987, Manchester, UMIST.
Software Engineering Principles in the Building of DSS. JISR-IIASA Joint Workshop on New Advances in DSS, April 1988, Kyoto, Japan.
An Interactive Programming Package for Decision Analysis of Interdependent Goals. IIASA Task-Force Meeting 1986, Schloss Laxenburg, Vienna, Austria.
System Analysis and Decision Making with Interdependent Goals - A Linguistic Approach. Second International Congress on Simulation Modelling and SA, Berlin, August 1985.
Gert - GPSS Simulationsprogramm und ihre Anwendug bei der Modelierung von Lenkungsprozeduren. Second International Symposium on Methodology of Mathematical Modelling. Varna, Bulgaria, 10-15 June 1984.
A Method for Decision Simulation Model of the Bulgarian National Economy. IIASA Task-Force Meeting, Albena, Bulgaria, 7-10 May 1984.
An Outline of a Fuzzy Sets Approach to Decision Making with Interdependent Goals, Nineth Conference SPUDM, Netherlands, 29 August - 2 September 1983.
Describing Conflicts among Multiple Objectives - A Fuzzy Sets Approach, Second International Seminar on Modern Methods for Decision Making, Sofia, Bulgaria, 6-10 June 1983.
Mathematical Analysis of the Influence of Relationships on the Determination of Scale and Organization Structure of Economic Units or Organization. Workshop on Size and Productive Efficiency - the Wider Applications, IIASA, June 1979.