@article{IVM_2004_7_a4,
     author = {V. I. Zhegalov},
     title = {On solvability cases for hyperbolic equations in quadratures},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {47--52},
     publisher = {mathdoc},
     number = {7},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2004_7_a4/}
}