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@article{MM2_1983__44_154956, author = {K.-H. F\"orster and E.-O. Liebetrau}, title = {Semi-Fredholm {Operators} and {Sequence} {Conditions.}}, journal = {Manuscripta mathematica}, pages = {35--44}, publisher = {mathdoc}, volume = {44}, year = {1983}, zbl = {0519.47009}, url = {http://geodesic.mathdoc.fr/item/MM2_1983__44_154956/} }
K.-H. Förster; E.-O. Liebetrau. Semi-Fredholm Operators and Sequence Conditions.. Manuscripta mathematica, Tome 44 (1983), pp. 35-44. http://geodesic.mathdoc.fr/item/MM2_1983__44_154956/