@article{AM2_1971__6_136210,
     author = {J\"URG R\"ATZ},
     title = {Zur {Linearit\"at} verallgemeinerter {Modulisometrien} {(Short} {Communication)}},
     journal = {Aequationes mathematicae},
     pages = {314--315},
     year = {1971},
     volume = {6},
     url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136210/}
}