@article{JMPA_1932_9_11__209_0,
     author = {Delens, Paul},
     title = {M\'etrique vectorielle et g\'eom\'etrie des sph\`eres},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {209--253},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 11},
     year = {1932},
     zbl = {0005.30904},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1932_9_11__209_0/}
}