@article{BSMF_1880__8__31_0,
     author = {Halphen, G.},
     title = {Observations sur la th\'eorie des caract\'eristiques},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {31--34},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {8},
     year = {1880},
     doi = {10.24033/bsmf.181},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.181/}
}