Tree traversals and permutations (with K. Hutson and R. M. Kretchmar)
in Congressus Numerantium 172. 2005.
A First Course in Abstract Algebra: Rings, Groups, and Fields, 2nd edition (pdf) (with Marlow Anderson)
Chapman & Hall/CRC Press 2005.
Essential Mathematics for Computer Science (pdf) (with Joan Krone)
Lattice-Order Groups (with Marlow Anderson)
D. Reidel. 1988.