@article{1178243244, author = {Nadler, Sam B.}, title = {Differentiable retractions in Banach spaces}, journal = {Tohoku Math. J. (2)}, volume = {19}, number = {4}, year = {1967}, pages = { 400-405}, language = {en}, url = {http://dml.mathdoc.fr/item/1178243244} }
Nadler, Sam B. Differentiable retractions in Banach spaces. Tohoku Math. J. (2), Tome 19 (1967) no. 4, pp. 400-405. http://gdmltest.u-ga.fr/item/1178243244/