@article{DAN_1969_189_6_a3,
     author = {A. Ya. Dubovitskii and A. A. Milyutin},
     title = {The maximum principle, in a class of variations that are small in absolute value, for optimal control problems with mixed constraints of equality and inequality type},
     journal = {Doklady Akademii Nauk},
     pages = {1177--1180},
     publisher = {mathdoc},
     volume = {189},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_189_6_a3/}
}