@article{JMPA_1936_9_15__171_0,
     author = {Darmois, G.},
     title = {Les singularit\'es d'une m\'etrique},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {171--176},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 15},
     year = {1936},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1936_9_15__171_0/}
}