@article{BSMF_1926__54__139_0,
     author = {Vessiot, E.},
     title = {Contribution \`a la g\'eom\'etrie conforme. {Th\'eorie} des surfaces. {I}},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {139--179},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {54},
     year = {1926},
     doi = {10.24033/bsmf.1100},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1100/}
}