I. M. Gessel and L. H. Kalikow, Hypergraphs and a functional equation of Bouwkamp and de Bruijn, Journal of Combinatorial Theory, Series A, vol.110, issue.2, pp.275-289, 2005.
DOI : 10.1016/j.jcta.2004.11.002

K. Husimi, Note on Mayers' Theory of Cluster Integrals, The Journal of Chemical Physics, vol.18, issue.5, pp.682-684, 1950.
DOI : 10.1063/1.1747725

J. Mccammond and J. Meier, The hypertree poset and the l 2 -Betti numbers of the motion group of the trivial link, Mathematische Annalen, vol.328, issue.4, pp.633-652, 2004.
DOI : 10.1007/s00208-003-0499-5

N. J. Sloane, The On-Line Encyclopedia of Integer Sequences
DOI : 10.1007/978-3-540-73086-6_12

R. P. Stanley, Enumerative Combinatorics, Volume I, 1997.

B. Roland, U. Grenoble, I. , and C. Umr, Institut Fourier, 100 rue des maths