Ershov, A. P., "The work of the Computing Centre of the Academy of Sciences of the USSR in the field of automatic programming pp257-278

Proceedings of the Symposium on the Mechanisation (1958) Proceedings of the Symposium on the Mechanisation of Thought Processes. Teddington, Middlesex, England: The National Physical Laboratory, November 1958  

Languages mentioned Flow Diagrams {1946} Graph based visual program language PP-1 {1954} Russian automatic programming system PP-2 {1955} Russian automatic programming system PP-BESM {1954} PP for the BESM computer PP-S {1957} Strela-3 computer