@article{DE_1992_28_2_a12,
     author = {A. Kh. Shamilov},
     title = {Solvability and unsolvability of a variant of boundary value problems with a free boundary for abstract second-order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {281--289},
     publisher = {mathdoc},
     volume = {28},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_2_a12/}
}