@article{FAA_1985_19_4_a4,
     author = {S. Yu. Dobrokhotov and P. N. Zhevandrov},
     title = {Nonstandard characteristics and {Maslov's} operatorial method in linear problems concerning unsteady water waves},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {43--54},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1985_19_4_a4/}
}