[ACM] CACM 12(08) (Aug 1969)

(1957) Communications of the ACM  

Perlis et al, A.J. (1964) Perlis et al, A.J. "An Extension of ALGOL for Manipulating Formulae", Bruce W. Arden , Bernard A. Galler , Robert M. Gra (1969) Bruce W. Arden , Bernard A. Galler , Robert M. Graham, "The MAD definition facility" p432-439 Feldman, J.A. et al (1969) Feldman, J.A. et al "An ALGOL-based Associative Language", J. Reymond, (1969) J. Reymond, "LG: A Language for Analytic Geometry"