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@article{SF_1993__47_2_135273, author = {C. Lizama}, title = {A mean ergodic theorem for resolvent operators.}, journal = {Semigroup forum}, pages = {227--230}, publisher = {mathdoc}, volume = {47}, number = {2}, year = {1993}, zbl = {0799.47024}, url = {http://geodesic.mathdoc.fr/item/SF_1993__47_2_135273/} }
C. Lizama. A mean ergodic theorem for resolvent operators.. Semigroup forum, Tome 47 (1993) no. 2, pp. 227-230. http://geodesic.mathdoc.fr/item/SF_1993__47_2_135273/