@article{TMF_1999_118_3_a2,
     author = {A. B. Borisov and S. A. Zykov},
     title = {Reflectionless {sine-Gordon} potentials with an infinite spectrum},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {337--346},
     publisher = {mathdoc},
     volume = {118},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1999_118_3_a2/}
}