@article{TMF_1999_118_3_a13,
     author = {V. A. Lazarev},
     title = {Perturbation of a two-soliton solution of the {Korteweg{\textendash}de~Vries} equation in the case of close amplitudes},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {434--440},
     year = {1999},
     volume = {118},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_118_3_a13/}
}