@article{INTO_2018_152_a1,
     author = {D. I. Borisov},
     title = {Perturbations of the {Continuous} {Spectrum} of a {Certain} {Nonlinear} {Two-Dimensional} {Operator} {Sheaf}},
     journal = {Itogi nauki i tehniki. Sovremenna\^a matematika i e\"e prilo\v{z}eni\^a. Temati\v{c}eskie obzory},
     pages = {13--24},
     publisher = {mathdoc},
     volume = {152},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/INTO_2018_152_a1/}
}