@article{GDZPPN002430355, title = {A Multiparameter Strongly Superadditive Ergodic Theorem.}, journal = {Mathematische Zeitschrift}, volume = {189}, year = {1985}, pages = {11-18}, zbl = {0565.60033}, url = {http://dml.mathdoc.fr/item/GDZPPN002430355} }
Emilion, R.; Hachem, B. A Multiparameter Strongly Superadditive Ergodic Theorem.. Mathematische Zeitschrift, Tome 189 (1985) pp. 11-18. http://gdmltest.u-ga.fr/item/GDZPPN002430355/