@article{AIHP_1933__4_2_173_0,
     author = {Brillouin, Marcel},
     title = {\'Equations aux d\'eriv\'ees partielles du 2e ordre. {Domaines} \`a connexion multiple. {Fonctions} sph\'eriques non antipodes},
     journal = {Annales de l'institut Henri Poincar\'e},
     pages = {173--206},
     publisher = {INSTITUT HENRI POINCAR\'E ET LES PRESSES UNIVERSITAIRES DE FRANCE},
     volume = {4},
     number = {2},
     year = {1933},
     zbl = {0010.06401},
     language = {fr},
     url = {http://archive.numdam.org/item/AIHP_1933__4_2_173_0/}
}