@incollection{AST_1984__113-114__234_0, author = {Legrand, A.}, title = {$\pi_1$ et $d_2$}, booktitle = {Homotopie alg\'ebrique et alg\`ebre locale}, author = {Collectif}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {113-114}, year = {1984}, mrnumber = {749062}, zbl = {0548.55014}, language = {fr}, url = {http://www.numdam.org/item/AST_1984__113-114__234_0/} }