%0 Journal Article
%A Gilbert Labelle
%A Pierre Leroux
%T An extension of the exponential formula in enumerative combinatorics
%J The electronic journal of combinatorics
%D 1996
%V 3
%N 2
%U http://geodesic.mathdoc.fr/articles/10.37236/1270/
%R 10.37236/1270
%F 10_37236_1270