@article{DE_1998_34_5_a11,
     author = {V. V. Tikhomirov},
     title = {Optimal control of nonlocal problems for distributed systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {709--718},
     year = {1998},
     volume = {34},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_5_a11/}
}