@article{DE_1984_20_12_a23,
     author = {M. M. Meredova},
     title = {Completeness of eigenfunctions in the eigenvalue problem for a sixth-order equation of mixed-composite type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2171--2173},
     publisher = {mathdoc},
     volume = {20},
     number = {12},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_12_a23/}
}