@article{SM_2017_208_2_a5,
     author = {S. A. Stepin},
     title = {An estimate for the number of eigenvalues of the {Schr\"odinger} operator with a~complex potential},
     journal = {Sbornik. Mathematics},
     pages = {269--284},
     publisher = {mathdoc},
     volume = {208},
     number = {2},
     year = {2017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_2017_208_2_a5/}
}