@article{VNGU_2008_8_3_a4,
     author = {A. I. Kozhanov},
     title = {Solvability of {Some} {Inverse} {Problems} of {Determining} {Coefficients} of {Mixed-Type} {Equations}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {81--99},
     publisher = {mathdoc},
     volume = {8},
     number = {3},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2008_8_3_a4/}
}