@article{IM2_1987_28_2_a2,
     author = {A. V. Dmitruk},
     title = {Quadratic conditions for {a~Pontryagin} minimum in an optimum control problem linear in the {control.~I:} {A~decoding} theorem},
     journal = {Izvestiya. Mathematics },
     pages = {275--303},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1987_28_2_a2/}
}