@article{JRAM_1839__19_147061,
     author = {Chr. J\"urgensen},
     title = {Sur la d\'ecomposition d'une certaine classe de fonctions.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {84--90},
     year = {1839},
     volume = {19},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1839__19_147061/}
}