@article{IVM_2022_2_a0,
     author = {A. A. Abashkin},
     title = {On the {Keldysh} problem for mixed type equation with two singular lines},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--17},
     publisher = {mathdoc},
     number = {2},
     year = {2022},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2022_2_a0/}
}