@article{DAN_1973_213_3_a2,
     author = {T. K. Vinogradova and V. F. Dem'yanov},
     title = {On the minimax principle in optimal control problems},
     journal = {Doklady Akademii Nauk},
     pages = {512--514},
     publisher = {mathdoc},
     volume = {213},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_3_a2/}
}