@article{05676051, title = {Gradient estimation of a }, journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]}, volume = {2010}, year = {2010}, zbl = {1186.35085}, language = {en}, url = {http://dml.mathdoc.fr/item/05676051} }
Wang, Bei; Ma, Li. Gradient estimation of a . Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2010 (2010) . http://gdmltest.u-ga.fr/item/05676051/