[ACM] JACM 9(1) January 1962
(1962)
[ACM]
[ACM] JACM
Cantor, D. G. (1962)
Cantor, D. G. "On the ambiguity problem of Backus Systems"
Lombardi, Lionello (1962)
Lombardi, Lionello "Mathematical aspects of non-arithmetic data processing procedures"