@article{DE_1996_32_2_a10,
     author = {M. P. Dymkov},
     title = {Optimality conditions in a linear two-parameter differential-difference control system with constraints},
     journal = {Differencialʹnye uravneni\^a},
     pages = {225--231},
     publisher = {mathdoc},
     volume = {32},
     number = {2},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_2_a10/}
}