@article{SLC_1983_08_a10,
     author = {P.-A. Picon},
     title = {Sur un th\'eor\`eme de {Landau}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {08},
     year = {1983},
     url = {http://geodesic.mathdoc.fr/item/SLC_1983_08_a10/}
}