@article{TMF_1992_92_1_a4,
     author = {L. A. Kalyakin},
     title = {Perturbation of the {Korteweg--de} {Vries} soliton},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {62--76},
     publisher = {mathdoc},
     volume = {92},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1992_92_1_a4/}
}