@article{RM_1960_15_1_a22,
     author = {M. Kim},
     title = {Approximate integration of a~system of two nonlinear second-order partial differential equations of hyperbolic type with two variables by the {S.} {A.~Chaplygin} method},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1960},
     volume = {15},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1960_15_1_a22/}
}