1. Allen J. Maintaining knowledge about temporal intervals. Commun ACM. 1983;26(11):832–43.
2. Constantopoulos P, Jarke M, Mylopoulos J, Vassiliou Y. The software information base: a server for reuse. VLDB J. 1995;4(1):1–43.
3. Greenspan SJ, Mylopoulos J, Borgida A. On formal requirements modeling languages: RML revisited. In: Proceedings of the 16th international conference on software engineering. 1994. p. 135–47.
4. Jarke M, Gallersdörfer R, Jeusfeld MA, Staudt M. ConceptBase – a deductive object base for meta data management. J Intell Inf Syst. 1995;4(2):167–92.
5. Jarke M, Mylopoulos J, Schmidt JW, Vassiliou Y. DAIDA: an environment for evolving information systems. ACM Trans Inf Syst. 1992;10(1):1–50.