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[3] H. G. Kahrimanian: Analytical Differentiation on a Digital Computer. Temple University, May 1953.

[4] B. Randel L. J. Russel: ALGOL 60 Implementation. Pergamon Press, London 1964. MR 0163448

[5] R. C. Tobey R. J. Bobrow S. Zilles: Experience with FORMAC Algorithm Design. Comm. ACM 9 (Aug. 1966), 8, 589-597.