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@article{DE_1979_15_4_a11, author = {V. I. Meleshko}, title = {Perturbations of unbounded closed pseudoinverse operators}, journal = {Differencialʹnye uravneni\^a}, pages = {681--694}, publisher = {mathdoc}, volume = {15}, number = {4}, year = {1979}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1979_15_4_a11/} }
V. I. Meleshko. Perturbations of unbounded closed pseudoinverse operators. Differencialʹnye uravneniâ, Tome 15 (1979) no. 4, pp. 681-694. http://geodesic.mathdoc.fr/item/DE_1979_15_4_a11/