@article{AIF_1977__27_2_197_0, author = {Neto, Alcides Lins}, title = {Local structural stability of $C^2$ integrable 1-forms}, journal = {Annales de l'Institut Fourier}, pages = {197--225}, publisher = {Institut Fourier}, volume = {27}, number = {2}, year = {1977}, doi = {10.5802/aif.657}, zbl = {0356.58008}, mrnumber = {58 #2848}, language = {en}, url = {http://www.numdam.org/articles/10.5802/aif.657/} }