1. Alford, M.: A Requirements Engineering Methodology for Real-Time Processing Requirements. IEEE Transactions on Software Engineering 3(1), 60–69 (1977)
2. Bell, T.E., Thayer, T.A.: Software Requirements: Are They Really a Problem? In: Proc. ICSE 1976: 2nd International Conference on Software Enginering, San Francisco, pp. 61–68 (1976)
3. Boehm, B.W.: Software Engineering Economics. Prentice-Hall, Englewood Cliffs (1981)
4. Borgida, A., Mylopoulos, J., Reiter, R.: And Nothing Else Changes: The Frame Problem in Procedure Specifications. In: Proc. ICSE 1993 - 15th International Conference on Software Engineering, Baltimore (May 1993)
5. Brodie, M., Mylopoulos, J., Schmidt, J. (eds.): On Conceptual Modeling: Perspectives from Artificial Intelligence, Databases, and Programming Languages. Springer, Heidelberg (1984)