@article{JMPA_1952_9_31__141_0,
     author = {Bouligand, Georges},
     title = {Sur les parall\'elismes g\'en\'eralis\'es},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {141--159},
     volume = {9e s{\'e}rie, 31},
     year = {1952},
     mrnumber = {48865},
     zbl = {0046.40101},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1952_9_31__141_0/}
}