@article{TMF_1987_70_3_a0,
     author = {S. P. Burtsev and V. E. Zakharov and A. V. Mikhailov},
     title = {Inverse scattering method with variable spectral parameter},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {323--341},
     publisher = {mathdoc},
     volume = {70},
     number = {3},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_70_3_a0/}
}