@article{JMPA_1866_2_11__193_0,
     author = {Mannheim},
     title = {Transformation par polaires r\'eciproques des propri\'et\'es relatives aux rayons de courbure},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {193--210},
     publisher = {Gauthier-Villars},
     volume = {2e s{\'e}rie, 11},
     year = {1866},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1866_2_11__193_0/}
}