TY - JOUR AU - Emilion, R. AU - Hachem, B. TI - A Multiparameter Strongly Superadditive Ergodic Theorem. JO - Mathematische Zeitschrift PY - 1985 VL - 189 SP - 11 EP - 18 KW - commuting positive contractions; strongly superadditive UR - http://eudml.org/doc/173563 ER -