1. Bubenko, J.A. & Kirikova, M. (1994) “‘Worlds’ in Requirements Acquisition and Modelling”, in Kangassalo, H. & Wangler, B. (eds.) The 4th European — Japanese Seminar on Information Modelling and Knowledge Bases, Kista, Sweden [later published by IOS, The Netherlands].
2. Bubenko, J.A (1993) “Extending the Scope of Information Modelling”, in Olivé, A. (ed.) Proceedings of the Fourth International Workshop on the Deductive Approach to Information Systems and Databases, Report LSI/93–25, Department de Llenguatges i Sistemes Informatics, Universitat Politecnica de Catalunya, Barcelona, Spain
3. Bubenko jr. J.A., Gustafsson, M.R., Nellborn, C. & Song, W. (1992) Computer Support for Enterprise Modelling and Requirements acquisition. From Fuzzy to Formal, Esprit III Project 6612: Deliverable 3–1–3-R1 Part B, SISU, Electrum 212, SE-164 40 Kista, Sweden.
4. Bubenko, J. & Wangler, B. (1993) “Objectives Driven Capture of Business Rules and of Information System Requirements”, in Proceedings of the 1993 IEEE Systems, Man, and Cybernetics Conference, Le Touquet, France
5. Dahlbom, B. & Mathiassen, L. (1993) Computers in Context: The Philosophy and Practice of Systems Design, NCC Blackwell, Cambridge, England.