@article{CMH_1944__17_138856,
     author = {Fr\'ed\'eric Riesz},
     title = {Sur la th\'eorie ergodique.},
     journal = {Commentarii mathematici Helvetici},
     pages = {221--239},
     publisher = {mathdoc},
     volume = {17},
     year = {1944},
     zbl = {0063.06500},
     url = {http://geodesic.mathdoc.fr/item/CMH_1944__17_138856/}
}