Ray-Chaudhuri, D. K.; Wilson, Richard M. (1971). "Solution of Kirkman's schoolgirl problem". In Motzkin, Theodore S. (ed.). Combinatorics (University of California, Los Angeles, Calif., March 21–22, 1968). Proceedings of Symposia in Pure Mathematics. Vol. XIX. Providence, Rhode Island: American Mathematical Society. pp. 187–203. MR0314644. Zbl0248.05009. See reviews by Jane Di Paola (MR) and C. C. Yalavigi (Zbl).
Ray-Chaudhuri, D. K.; Wilson, Richard M. (1971). "Solution of Kirkman's schoolgirl problem". In Motzkin, Theodore S. (ed.). Combinatorics (University of California, Los Angeles, Calif., March 21–22, 1968). Proceedings of Symposia in Pure Mathematics. Vol. XIX. Providence, Rhode Island: American Mathematical Society. pp. 187–203. MR0314644. Zbl0248.05009. See reviews by Jane Di Paola (MR) and C. C. Yalavigi (Zbl).