Monotone Congruence Algorithms - Richard F. Arnold; Donald L. Richards (Inf. Control., 1966)

SWAP - a programming system for automatic simulation, wiring and placement of logical equations. - Donald L. Richards (DAC, 1967)

How To Keep the Addresses Short. - Donald L. Richards (Commun. ACM, 1971)

Efficient Exercising of Switching Elements in Nets of Identical Gates. - Donald L. Richards (J. ACM, 1973)

Efficient Exercising of Switching Elements in Combinatorial Nets. - Donald L. Richards (J. ACM, 1973)