[ACM] CACM 21(08) (August 1978).

(1957) Communications of the ACM  

Backus, John (1978) Backus, John "Can programming be liberated from the von Neumann style? A functional style and its algebra of programs" (1977 Turing Award Lecture) Hoare, C A R (1978) Hoare, C A R "Communicating Sequential Processes", pp666-677