%0 Journal Article %A A. E. Brouwer %A C. F. Mills %A W. H. Mills %A A. Verbeek %T Counting families of mutually intersecting sets %J The electronic journal of combinatorics %D 2013 %V 20 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/2693/ %R 10.37236/2693 %F 10_37236_2693