@article{UZKU_1963_123_10_a7,
     author = {Yu. M. Krikunov},
     title = {The {Tricomi} problem with derivatives in the boundary condition},
     journal = {U\v{c}\"enye zapiski Kazanskogo universiteta. Seri\^a Fiziko-matemati\v{c}eskie nauki},
     pages = {106--113},
     publisher = {mathdoc},
     volume = {123},
     number = {10},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZKU_1963_123_10_a7/}
}