@article{MZM_2008_84_5_a5,
     author = {O. M. Dzhokhadze and S. S. Kharibegashvili},
     title = {First {Darboux} {Problem} for {Nonlinear} {Hyperbolic} {Equations} of {Second} {Order}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {693--712},
     publisher = {mathdoc},
     volume = {84},
     number = {5},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2008_84_5_a5/}
}