@article{DE_2003_39_12_a0,
     author = {A. V. Arutyunov},
     title = {The {Pontryagin} {Maximum} {Principle} and {Sufficient} {Optimality} {Conditions} for {Nonlinear} {Problems}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1587--1595},
     publisher = {mathdoc},
     volume = {39},
     number = {12},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_12_a0/}
}