@article{MZM_1993_53_3_a6,
     author = {N. A. Kostov and V. Z. \`Enol'skii},
     title = {Spectral characteristics of elliptic solitons},
     journal = {Matemati\v{c}eskie zametki},
     pages = {62--71},
     publisher = {mathdoc},
     volume = {53},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1993_53_3_a6/}
}