@article{MZM_2003_73_2_a15,
     author = {D. S. Lapin and A. M. Filimonov},
     title = {Mixed {Problem} for {Singular} {Quasilinear} {Hyperbolic} {Systems} with a {Single} {Spatial} {Variable}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {315--318},
     publisher = {mathdoc},
     volume = {73},
     number = {2},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2003_73_2_a15/}
}