Voir la notice de l'article provenant de la source Math-Net.Ru
@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/} }
Yu. Sh. Abramov. Some questions on the spectral theory of the equations $Tx=\lambda Sx$. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 1 (1977), pp. 3-13. http://geodesic.mathdoc.fr/item/IVM_1977_1_a0/