@article{DAN_1986_287_1_a4,
     author = {K. B. Baikuziev},
     title = {The fundamental mixed problem for a higher-order equation with two perpendicular lines of degeneration},
     journal = {Doklady Akademii Nauk},
     pages = {25--29},
     publisher = {mathdoc},
     volume = {287},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_287_1_a4/}
}