1. Proving program inclusion using Hoare's logic;Bergstra;Theoret. Comput. Sci.,1984
2. Program Proving as hand simulation with a little induction;Burstall;Inform. Process.,1974
3. The Evolution of Programs;Dershowitz,1983
4. A Discipline of Programming;Dijkstra,1976
5. Lecture held on 8/4/1988;Dijkstra;International Summer School “Constructive Methods in Computing Science”,1988