@article{BSMF_1913__41__126_1,
     author = {Delassus, Et.},
     title = {Sur les syst\`emes de {Lagrange} \`a param\`etre principal},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {126--146},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {41},
     year = {1913},
     doi = {10.24033/bsmf.920},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.920/}
}