The chromatic index of cyclic Steiner 2-designs. Colbourn, Charles J.; Colbourn, Marlene J. — 1982 International Journal of Mathematics and Mathematical Sciences
Bicoloring Steiner triple systems. Colbourn, Charles J.; Dinitz, Jeffrey H.; Rosa, Alexander — 1999 The Electronic Journal of Combinatorics [electronic only]
Leaves, excesses and neighborhoods Charles J. Colbourn — 1987 Acta Universitatis Carolinae. Mathematica et Physica
Properties of the Steiner triple systems of order 19. Colbourn, Charles J.; Forbes, Anthony D.; Grannell, Mike J.; Griggs, Terry S.; Kaski, Petteri; Östergård, Patric R.J.; Pike, David A.; Pottonen, Olli — 2010 The Electronic Journal of Combinatorics [electronic only]
Generating sets in Steiner triple systems Charles J. Colbourn; Jeffrey H. Dinitz — 2000 Mathematica Slovaca