@article{JMPA_1938_9_17_1-4_169_0,
     author = {Cotton, \'Emile},
     title = {Sur le pivotement et le contact des surfaces},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {169--178},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 17},
     number = {1-4},
     year = {1938},
     zbl = {0018.37305},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1938_9_17_1-4_169_0/}
}