@article{JMPA_1883_3_9__5_0,
     author = {Appell},
     title = {G\'en\'eralisation des fonctions doublement p\'eriodiques de seconde esp\`ece},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {5--24},
     publisher = {Gauthier-Villars},
     volume = {3e s{\'e}rie, 9},
     year = {1883},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1883_3_9__5_0/}
}