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@article{KUIPM_1992_a12, author = {A. M. Sidorov}, title = {The basis property of analytically perturbed eigenelements}, journal = {Issledovaniya po Prikladnoi Matematike i Informatike}, pages = {115--121}, publisher = {mathdoc}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUIPM_1992_a12/} }
A. M. Sidorov. The basis property of analytically perturbed eigenelements. Issledovaniya po Prikladnoi Matematike i Informatike, Issledovaniya po Prikladnoi Matematike (1992), pp. 115-121. http://geodesic.mathdoc.fr/item/KUIPM_1992_a12/