manuscripta mathematica · 1974 · 27 citations · 3 references
3
Sylvester's problem of the 15 schoolgirls
R. H. F. Denniston · Discrete Mathematics · 1974 · 55 citations
On the maximum number of disjoint Steiner triple systems
Luc Teirlinck · Discrete Mathematics · 1973 · 50 citations
Some balanced complete block designs
Shmuel Schreiber · Israel Journal of Mathematics · 1974 · 17 citations