1. A complete census of (10,3,2) block designs and of Mendelsohn triple systems of order ten, III. (10,3,2) block designs without repeated blocks;Colbourn;Congr. Numer.,1983
2. Steiner triple systems of order 19 with nontrivial automorphism group;Colbourn;Math. Comp.,1992
3. The triad systems of thirteen letters;Cole;Trans. Amer. Math. Soc.,1913
4. The complete enumeration of triad systems in 15 elements;Cole;Proc. Natl. Acad. Sci. USA,1917
5. Constructive enumeration of combinatorial objects;Faradžev,1978