@article{01125925, title = {A lower bound for the gradient of }, journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]}, volume = {1996}, year = {1996}, zbl = {0886.35028}, language = {en}, url = {http://dml.mathdoc.fr/item/01125925} }
Rosset, Edi. A lower bound for the gradient of . Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 1996 (1996) . http://gdmltest.u-ga.fr/item/01125925/