1. Initial algebra semantics and continuous algebras;Goguen;J. ACM,1977
2. Specification of abstract data types using conditional axioms;Thatcher;IBM Research Report RC-6214,1976
3. An initial algebra approach to the specification, correctness, and implementation of abstract data types;Goguen,1981
4. Some fundamentals of order algebraic semantics;Wagner,1976
5. Rational algebraic theories and fixed-point solutions;Wright;Proc. 17th IEEE Symposium on Foundations of Computing,1976