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@article{MZM_1987_41_5_a1, author = {D. S. Dzhumabaev}, title = {Convergence of iterative methods for unbounded operator equations}, journal = {Matemati\v{c}eskie zametki}, pages = {637--645}, publisher = {mathdoc}, volume = {41}, number = {5}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a1/} }
D. S. Dzhumabaev. Convergence of iterative methods for unbounded operator equations. Matematičeskie zametki, Tome 41 (1987) no. 5, pp. 637-645. http://geodesic.mathdoc.fr/item/MZM_1987_41_5_a1/