@article{05237100, title = {Maximum principles for a class of nonlinear second-order elliptic boundary value problems in divergence form.}, journal = {Boundary Value Problems [electronic only]}, volume = {2006}, year = {2006}, doi = {10.1155/BVP/2006/64543}, zbl = {1146.35366}, language = {en}, url = {http://dml.mathdoc.fr/item/05237100} }
Enache, Cristian. Maximum principles for a class of nonlinear second-order elliptic boundary value problems in divergence form.. Boundary Value Problems [electronic only], Tome 2006 (2006) . doi : 10.1155/BVP/2006/64543. http://gdmltest.u-ga.fr/item/05237100/