@article{DE_1989_25_1_a16,
     author = {V. N. Sushch},
     title = {Control in nonlocal boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {145--153},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_1_a16/}
}