@article{1077491417, author = {Dunford, Nelson}, title = {A mean ergodic theorem}, journal = {Duke Math. J.}, volume = {5}, number = {1}, year = {1939}, pages = { 635-646}, language = {en}, url = {http://dml.mathdoc.fr/item/1077491417} }
Dunford, Nelson. A mean ergodic theorem. Duke Math. J., Tome 5 (1939) no. 1, pp. 635-646. http://gdmltest.u-ga.fr/item/1077491417/