@article{MZM_2003_74_3_a11,
     author = {L. S. Pulkina},
     title = {A {Mixed} {Problem} with {Integral} {Condition} for the {Hyperbolic} {Equation}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {435--445},
     publisher = {mathdoc},
     volume = {74},
     number = {3},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_74_3_a11/}
}