1. “Over de combinatorische opgave van Steiner”;Barrau;Kon. Akad. Wetensch. Amst. Verslag Wis. en Natuurk. Afd.,1908
2. “On the combinatory problem of Steiner”;Kon. Akad. Wetensch. Amst. Proe. Sect. Sci.,1908
3. “Nonisomorphic solutions of some BIBDs III”;Bhat;Journal of Combinatorial Theory,1972
4. “A new balanced incomplete block design”;Bhattacharya;Science and Culture,1944
5. “The 2–(9,4,3) and 3–(10,5,3) designs”;Breach;Journal of Combinatorial Theory,1979