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@article{JRAM_1981__323_152332, author = {U. Krengel and M.A. Akcoglu}, title = {Ergodic theorems for superadditive processes.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {53--67}, publisher = {mathdoc}, volume = {323}, year = {1981}, zbl = {0453.60039}, url = {http://geodesic.mathdoc.fr/item/JRAM_1981__323_152332/} }
U. Krengel; M.A. Akcoglu. Ergodic theorems for superadditive processes.. Journal für die reine und angewandte Mathematik, Tome 323 (1981), pp. 53-67. http://geodesic.mathdoc.fr/item/JRAM_1981__323_152332/