1. ADA Reference Manual,1981
2. Arrows, Structures and Functors;Arbib,1975
3. Algebraic specification of modules and their basic interconnections;Blum;J. Comput. System Sci.,1987
4. The Munich Project CIP, Vol. 1: The Wide Spectrum language CIP-L,1985
5. A comprehensive algebraic approach to system specification and development;ESPRIT BRA Proposal 1988,1988