@article{TIMM_2017_23_2_a22,
     author = {I. Kh. Khusnullin},
     title = {Perturbation of a waveguide by a narrow potential},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {274--284},
     year = {2017},
     volume = {23},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2017_23_2_a22/}
}