@article{TMF_1994_99_2_a15,
     author = {V. S. Gerdjikov},
     title = {The generalized {Zakharov--Shabat} system and the soliton perturbations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {292--299},
     publisher = {mathdoc},
     volume = {99},
     number = {2},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TMF_1994_99_2_a15/}
}