@article{05237454, title = {Necessary conditions of optimality for second-order nonlinear impulsive differential equations.}, journal = {Advances in Difference Equations [electronic only]}, volume = {2007}, year = {2007}, doi = {10.1155/2007/40160}, zbl = {1140.49018}, language = {en}, url = {http://dml.mathdoc.fr/item/05237454} }
Peng, Y.; Xiang, X.; Wei, W. Necessary conditions of optimality for second-order nonlinear impulsive differential equations.. Advances in Difference Equations [electronic only], Tome 2007 (2007) . doi : 10.1155/2007/40160. http://gdmltest.u-ga.fr/item/05237454/