1. A note on two-fold triple systems;Bhattacharya;Sankhyā,1943
2. A bibliography and survey of Steiner systems;Doyen,1972
3. Combinatorial Theory;Hall,1967
4. Instructional lectures on combinatorial designs;Hanani;Calgary Internl. Conf. on Combinatorial Structures and Their Applications,1969
5. Graph Theory;Harary,1969