@article{1183530320, author = {Lin, Sue-Chin}, title = {On smoothness of gentle perturbations}, journal = {Bull. Amer. Math. Soc.}, volume = {75}, number = {5}, year = {1969}, pages = { 445-449}, language = {en}, url = {http://dml.mathdoc.fr/item/1183530320} }
Lin, Sue-Chin. On smoothness of gentle perturbations. Bull. Amer. Math. Soc., Tome 75 (1969) no. 5, pp. 445-449. http://gdmltest.u-ga.fr/item/1183530320/