@article{DE_1975_11_9_a15,
     author = {M. M. Smirnov},
     title = {A boundary value problem with shift for a fourth order equation of mixed-composite type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1678--1686},
     publisher = {mathdoc},
     volume = {11},
     number = {9},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_9_a15/}
}