Relation Algebras andt-vertex Condition Graphs. - Jerzy Wojdylo (Eur. J. Comb., 1998)

An Inextensible Association Scheme Associated with a 4-regular Graph. - Jerzy Wojdylo (Graphs Comb., 2001)

On the Keyspace of the Hill Cipher. - Jeffrey Overbey; William N. Traves; Jerzy Wojdylo (Cryptologia, 2005)