On the structure and automorphisms of finite automata /

Issued also as thesis, University of Illinois.

Centralizers of finite subgroups of automorphisms and outer automorphisms of free groups /

Thesis (Ph. D.)--Cornell University, August, 1998.

On the automorphism group of a reduced automaton /

"Supported in part jointly by the Atomic Energy Commission and the Advanced Research Projects Agency under AEC Contract AT(11-1)-1018."