Finite Approximants of Compact Totally Disconnected Machines. - Alexander R. Bednarek; A. D. Wallace (Math. Syst. Theory, 1967)

A Relation-Theoretic Result with Applications in Topological Algebra. - Alexander R. Bednarek; A. D. Wallace (Math. Syst. Theory, 1967)

Multiplication Induced in the State-Space of an Act. - J. M. Day; A. D. Wallace (Math. Syst. Theory, 1967)

Externally Induced Operations. - A. D. Wallace (Math. Syst. Theory, 1969)