@article{DAN_1988_303_6_a3,
     author = {I. E. Egorov},
     title = {A boundary value problem for a higher-order equation with changing},
     journal = {Doklady Akademii Nauk},
     pages = {1301--1304},
     publisher = {mathdoc},
     volume = {303},
     number = {6},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_303_6_a3/}
}