@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/