@article{SLC_1990_25_a10,
     author = {Germain Kreweras},
     title = {Sur les polyn\^omes de {Catalan} multiples},
     journal = {S\'eminaire lotharingien de combinatoire},
     year = {1990},
     volume = {25},
     url = {http://geodesic.mathdoc.fr/item/SLC_1990_25_a10/}
}