@article{MM2_1974__13_154255,
     author = {J\"urgen Tischer and Hans Wittmer},
     title = {Invarianz gewisser {Operatorenklassen} unter nichtkommutativen ergodischen {Mitteln.}},
     journal = {Manuscripta mathematica},
     pages = {73--82},
     publisher = {mathdoc},
     volume = {13},
     year = {1974},
     zbl = {0282.46057},
     url = {http://geodesic.mathdoc.fr/item/MM2_1974__13_154255/}
}