@article{DE_1991_27_6_a13,
     author = {V. I. Korzyuk},
     title = {An energy inequality for a boundary value problem for a third-order hyperbolic equation with a wave operator},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1014--1022},
     publisher = {mathdoc},
     volume = {27},
     number = {6},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_6_a13/}
}