@article{AIF_1971__21_3_83_0, author = {Lehmann, Daniel}, title = {Sur les obstructions \`a l{\textquoteright}int\'egrabilit\'e des $G$-structures}, journal = {Annales de l'Institut Fourier}, pages = {83--93}, publisher = {Institut Fourier}, address = {Grenoble}, volume = {21}, number = {3}, year = {1971}, doi = {10.5802/aif.379}, mrnumber = {49 #3751}, zbl = {0222.53034}, language = {fr}, url = {http://www.numdam.org/articles/10.5802/aif.379/} }