1. An examination of the different possible solutions of a problem in incomplete blocks;Fisher;Ann. Eugenics,1940
2. On the Steiner systems S(3, 4, 14) and S(4, 5, 15);Hung;Utilitas Math.,1972
3. Enumeration of non-isomorphic solutions of balanced incomplete block designs;Nandi;Sankhyā,1946
4. Generalisation of Fisher's inequality to t-designs;Ray-Chaudhuri;Am. Math. Soc. Notes,1971