@article{KUKZ_1977_14_14_a4,
     author = {R. M. Ganeev},
     title = {The {Tricomi} problem for a system of equations of mixed type},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {42--52},
     publisher = {mathdoc},
     volume = {14},
     number = {14},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1977_14_14_a4/}
}