Orientable self-embeddings of Steiner triple systems of order 15. Bennett, G.K.; Grannell, M.J.; Griggs, T.S. — 2006 Acta Mathematica Universitatis Comenianae. New Series
Non-orientable biembeddings of Steiner triple systems of order 15. Bennett, G.K.; Grannell, M.J.; Griggs, T.S. — 2004 Acta Mathematica Universitatis Comenianae. New Series