@article{CMH_1943__16_138837,
     author = {Beno Eckmann},
     title = {\"Uber monothetische {Gruppen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {249--263},
     publisher = {mathdoc},
     volume = {16},
     year = {1943},
     zbl = {0061.04402},
     url = {http://geodesic.mathdoc.fr/item/CMH_1943__16_138837/}
}