@article{BSMF_1969__97__81_0,
     author = {Lazard, Daniel},
     title = {Autour de la platitude},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {81--128},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {97},
     year = {1969},
     doi = {10.24033/bsmf.1675},
     mrnumber = {40 #7310},
     zbl = {0174.33301},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1675/}
}