@article{IVM_1977_1_a0,
     author = {Yu. Sh. Abramov},
     title = {Some questions on the spectral theory of the equations $Tx=\lambda Sx$},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--13},
     publisher = {mathdoc},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1977_1_a0/}
}