@article{DAN_1995_345_6_a4,
     author = {S. V. Meleshko},
     title = {On double waves of equations with three independent variables},
     journal = {Doklady Akademii Nauk},
     pages = {740--742},
     year = {1995},
     volume = {345},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1995_345_6_a4/}
}