@article{BSMF_1959__87__409_0,
     author = {Libermann, P.},
     title = {Pseudogroupes infinit\'esimaux attach\'es aux pseudogroupes de lie},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {409--425},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {87},
     year = {1959},
     doi = {10.24033/bsmf.1536},
     mrnumber = {23 #A607},
     zbl = {0198.26801},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1536/}
}