@article{05237130, title = {Solvability of second-order }, journal = {Boundary Value Problems [electronic only]}, volume = {2007}, year = {2007}, doi = {10.1155/2007/97067}, zbl = {1153.34020}, language = {en}, url = {http://dml.mathdoc.fr/item/05237130} }
Li, Jianli; Liu, Sanhui. Solvability of second-order . Boundary Value Problems [electronic only], Tome 2007 (2007) . doi : 10.1155/2007/97067. http://gdmltest.u-ga.fr/item/05237130/