@article{DE_1991_27_10_a12,
     author = {F. E. Lomovtsev and N. J. Yurchuk},
     title = {Boundary value problems for operator-differential equations with a variable domain of the operator coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1754--1766},
     publisher = {mathdoc},
     volume = {27},
     number = {10},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_10_a12/}
}