[ACM] CACM 15(07) (July 1972)

(1957) Communications of the ACM  

Bauer, F.L.; Wössner, H. (1972) Bauer, F.L.; Wössner, H. "The Plankalkül of Konrad Zuse: a forerunner of today's programming languages" Rosen, S. (1972) Rosen, S. "Programming Systems and Languages 1965-1975"