@article{JMPA_1936_9_15__411_0,
     author = {Chazy, Jean},
     title = {Sur les solutions p\'eriodiques d'un syst\`eme diff\'erentiel au voisinage d'une position d'\'equilibre},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {411--421},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 15},
     year = {1936},
     zbl = {0015.15804},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1936_9_15__411_0/}
}