1. Cycle decompositions of Kn and Kn-I;Alspach;J. Combin. Theory (Ser. B),2001
2. Decomposition of complete tripartite graphs into gregarious 4-cycles;Billington;Discrete Math.,2003
3. E.J. Billington, D.G. Hoffman, Equipartite and almost equipartite gregarious 4-cycle systems, Discrete Math., to appear.
4. Group divisible pentagon systems;Billington;Utilitas Math.,1999
5. E.J. Billington, D.G. Hoffman, C.A. Rodger, Resolvable gregarious cycle decompositions of complete equipartite graphs, Discrete Math., to appear.