TY  - JOUR
AU  - Gilbert Labelle
AU  - Pierre Leroux
TI  - An extension of the exponential formula in enumerative combinatorics
JO  - The electronic journal of combinatorics
PY  - 1996
VL  - 3
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1270/
DO  - 10.37236/1270
ID  - 10_37236_1270
ER  -