@article{1077489217, author = {Whitney, Hassler}, title = {A function not constant on a connected set of critical points}, journal = {Duke Math. J.}, volume = {1}, number = {1}, year = {1935}, pages = { 514-517}, language = {en}, url = {http://dml.mathdoc.fr/item/1077489217} }
Whitney, Hassler. A function not constant on a connected set of critical points. Duke Math. J., Tome 1 (1935) no. 1, pp. 514-517. http://gdmltest.u-ga.fr/item/1077489217/