@article{ASENS_1944_3_61__249_0,
     author = {Ch\^atelet, Fran\c{c}ois},
     title = {Variations sur un th\`eme de H. Poincar\'e},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {249--300},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 61},
     year = {1944},
     doi = {10.24033/asens.918},
     zbl = {0063.00801},
     mrnumber = {7,323a},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/asens.918/}
}

Châtelet, François. Variations sur un thème de H. Poincaré. Annales scientifiques de l'École Normale Supérieure, Série 3, Tome 61 (1944) , pp. 249-300. doi : 10.24033/asens.918. http://archive.numdam.org/articles/10.24033/asens.918/