@article{TMF_1987_72_1_a14,
     author = {L. V. Bogdanov},
     title = {On the two-dimensional {Zakharov--Shabat} problem},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {155--159},
     publisher = {mathdoc},
     volume = {72},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_72_1_a14/}
}