@article{CMFD_2019_65_1_a6,
     author = {D. G. Rakhimov},
     title = {Reductional method in perturbation theory of generalized spectral {E.~Schmidt} problem},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {72--82},
     publisher = {mathdoc},
     volume = {65},
     number = {1},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2019_65_1_a6/}
}