1. Office Automation: Tools and Concepts, ed. D. Tsichritzis, Springer-Verlag, Berlin, 1985.
2. D. Tsichritzis, E. Fiume, S. Gibbs, and O. Nierstrasz, “KNOs: Knowledge Acquisition, Dissemination and Manipulation Objects,” ACM Trans. Office Information Syst., vol. 5, no. 1, pp. 96–112, 1987.
3. E. Casais, “An Object-Oriented System Implementing KNOs,” Proc. of the Conf. on Office Information Systems (COIS), Palo Alto, March 1988, pp. 284–290.
4. Object-Oriented Software Composition, ed. O. Nierstrasz, D. Tsichritzis, Prentice-Hall, 1995.
5. Multimedia Programming: Objects, Environments and Frameworks, S. Gibbs and D. Tsichritzis, Addison-Wesley/ACM Press 1994.