@article{DE_1987_23_10_a6,
     author = {E. N. Provotorova},
     title = {Vector boundary value problems generated by a scalar differential operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1711--1715},
     publisher = {mathdoc},
     volume = {23},
     number = {10},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_10_a6/}
}