@article{TRSPY_1968_103_a8,
     author = {V. P. Mikhailov},
     title = {The generalized {Tricomi} problem},
     journal = {Informatics and Automation},
     pages = {142--161},
     publisher = {mathdoc},
     volume = {103},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1968_103_a8/}
}