@article{MZ_1985__189_173563,
     author = {R. Emilion and B. Hachem},
     title = {A {Multiparameter} {Strongly} {Superadditive} {Ergodic} {Theorem.}},
     journal = {Mathematische Zeitschrift},
     pages = {11--18},
     publisher = {mathdoc},
     volume = {189},
     year = {1985},
     zbl = {0565.60033},
     url = {http://geodesic.mathdoc.fr/item/MZ_1985__189_173563/}
}