1. G-decomposition of Kn where G has four vertices or less;Bermond;Discrete Math.,1977
2. The intersection problem for combinatorial designs;Billington;Congr. Numer.,1993
3. The intersection problem for small G-designs;Billington;Australas. J. Combin.,1995
4. The triangle intersection problem for K4−e designs;Billington;Util. Math.,2007
5. Intersections of group divisible triple systems;Butler;Ars Combin.,1992