@article{IVM_2017_7_a3,
     author = {V. S. Mokeychev},
     title = {Existence of eigenvalues of operators acting in $L^2(R^n)$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {30--40},
     publisher = {mathdoc},
     number = {7},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2017_7_a3/}
}