@article{IVM_2017_7_a0,
     author = {A. R. Bikmetov and I. Kh. Khusnullin},
     title = {Perturbation of {Hill} operator by narrow potentials},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--13},
     publisher = {mathdoc},
     number = {7},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2017_7_a0/}
}