@article{DAN_1971_200_6_a8,
     author = {V. F. Illarionov and V. T. Pashintsev},
     title = {Properties of the extremal field in an optimal control problem},
     journal = {Doklady Akademii Nauk},
     pages = {1291--1293},
     publisher = {mathdoc},
     volume = {200},
     number = {6},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1971_200_6_a8/}
}