@article{SLC_2018-2020_78_a0,
     author = {Gilbert Labelle},
     title = {Binomial {Species} and {Combinatorial} {Exponentiation}},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {2018-2020},
     volume = {78},
     url = {http://geodesic.mathdoc.fr/item/SLC_2018-2020_78_a0/}
}