Voir la notice de l'article provenant de la source The Polish Digital Mathematics Library
@article{CC_2009_38_4B_a16, author = {Tikhomirov, Vladimir}, title = {Lagrange principle and necessary conditions}, journal = {Control and Cybernetics}, pages = {1589--1605}, publisher = {mathdoc}, volume = {38}, number = {4B}, year = {2009}, zbl = {1263.90096}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CC_2009_38_4B_a16/} }
Tikhomirov, Vladimir. Lagrange principle and necessary conditions. Control and Cybernetics, Tome 38 (2009) no. 4B, pp. 1589-1605. http://geodesic.mathdoc.fr/item/CC_2009_38_4B_a16/