@article{GDZPPN002284685, title = {Die Winkelmetrik in der affin-orthogonalen Ebene.}, journal = {Mathematische Annalen}, volume = {129}, year = {1955}, pages = {183-195}, zbl = {0065.36201}, url = {http://dml.mathdoc.fr/item/GDZPPN002284685} }
Schütte, K. Die Winkelmetrik in der affin-orthogonalen Ebene.. Mathematische Annalen, Tome 129 (1955) pp. 183-195. http://gdmltest.u-ga.fr/item/GDZPPN002284685/