@article{MZM_1999_66_3_a6,
     author = {N. K. Mamadaliev},
     title = {Tricomi problem for strongly degenerate equations of parabolic-hyperbolic type},
     journal = {Matemati\v{c}eskie zametki},
     pages = {385--392},
     publisher = {mathdoc},
     volume = {66},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1999_66_3_a6/}
}