@article{BSMF_1955__83__251_0,
     author = {Lazard, Michel},
     title = {Sur les groupes de {Lie} formels \`a un param\`etre},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {251--274},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {83},
     year = {1955},
     doi = {10.24033/bsmf.1462},
     zbl = {0068.25703},
     mrnumber = {73925},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1462/}
}