Metropolis, N. et al., (eds.),A History of Computing in the Twentieth Century (Proceedings of the International Conference on the History of Computing, June 10 15, 1976) Academic Press, New York, 1980
Backus, John (1976)
Backus, John "Programming in America in the nineteen fifties - some personal impressions" pp125-135
Ershov and Shura-Bura (1985)
Ershov and Shura-Bura "The Early Development of Programming in the USSR"