@article{DE_1990_26_1_a17,
     author = {V. V. Tikhomirov},
     title = {The unconditional basis property of root vectors of nonlocal problems for systems of equations with deviating arguments},
     journal = {Differencialʹnye uravneni\^a},
     pages = {147--153},
     publisher = {mathdoc},
     volume = {26},
     number = {1},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_1_a17/}
}