@article{BSMF_1875__3__28_0,
     author = {Halphen, G.},
     title = {Sur le contact des surfaces},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {28--37},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {3},
     year = {1875},
     doi = {10.24033/bsmf.78},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.78/}
}