@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}, zbl = {0174.33301}, mrnumber = {40 #7310}, language = {fr}, url = {http://archive.numdam.org/articles/10.24033/bsmf.1675/} }