Sequencing certain dihedral groups. - John Isbell (Discret. Math., 1990)

Relatively Parametrizable Subalgebras. - John Isbell (Appl. Categorical Struct., 2000)

A Union of Proper Subspaces?: 10707. - John Isbell; Julio Kuplinsky; Leon Mattics (Am. Math. Mon., 2000)

Fixed Points of Iterated Cyclic Difference Operators: 10676. - John Isbell; Stephen H. Schanuel; Stephen M. Gagola Jr.; Mowaffaq Hajja (Am. Math. Mon., 2000)