@article{CMH_1973__48_139534,
     author = {Hans-Christoph Im Hof},
     title = {\"Uber die {Isometriegruppe} bei kompakten {Mannigfaltigkeiten} negative {Kr\"ummung}},
     journal = {Commentarii mathematici Helvetici},
     pages = {14--30},
     publisher = {mathdoc},
     volume = {48},
     year = {1973},
     zbl = {0258.53040},
     url = {http://geodesic.mathdoc.fr/item/CMH_1973__48_139534/}
}