@article{1183493473, author = {Whyburn, W. M.}, title = {Non-isolated critical points of functions}, journal = {Bull. Amer. Math. Soc.}, volume = {35}, number = {6}, year = {1929}, pages = { 701-708}, language = {en}, url = {http://dml.mathdoc.fr/item/1183493473} }
Whyburn, W. M. Non-isolated critical points of functions. Bull. Amer. Math. Soc., Tome 35 (1929) no. 6, pp. 701-708. http://gdmltest.u-ga.fr/item/1183493473/