@article{IVM_1996_3_a7,
     author = {R. S. Khairullin},
     title = {The {Tricomi} problem for an equation with singular coefficients},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {68--76},
     publisher = {mathdoc},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1996_3_a7/}
}