@article{JMPA_1952_9_31__305_0,
     author = {Biernacki, M.},
     title = {Sur quelques propri\'et\'es des fonctions de distances},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {305--318},
     volume = {9e s{\'e}rie, 31},
     year = {1952},
     mrnumber = {52812},
     zbl = {0047.29702},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1952_9_31__305_0/}
}