@article{DE_1983_19_4_a26,
     author = {V. A. Malovichko},
     title = {The first boundary value problem for a fourth-order equation with a nonnegative characteristic form},
     journal = {Differencialʹnye uravneni\^a},
     pages = {712--714},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1983_19_4_a26/}
}