@article{TMF_1997_112_1_a1,
     author = {S. Yu. Dobrokhotov},
     title = {Reduction of {Hugoniot{\textendash}Maslov} chains for trajectories of solitary vortices of the {\textquotedblleft}shallow water{\textquotedblright} equations to the {Hill} equation},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {47--66},
     year = {1997},
     volume = {112},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1997_112_1_a1/}
}