Engeli, M.E. "Formula manipulationthe user's point of view" pp117-171
(1969)
Advances in Information Systems Science, Vol. (1969)
Advances in Information Systems Science, Vol. 1 Tou, J T (ed) Plenum Press, New York, 1969
Max Engeli
Languages mentioned
SYMBAL
{1967} An extension of ALGOL to do formal algebraic manipulation.