@article{GDZPPN002038196, title = {Note on angle-preserving mappings.}, journal = {Aequationes mathematicae}, volume = {40}, year = {1990}, pages = {1-7}, zbl = {0712.51010}, url = {http://dml.mathdoc.fr/item/GDZPPN002038196} }
Alpers, B. Note on angle-preserving mappings.. Aequationes mathematicae, Tome 40 (1990) pp. 1-7. http://gdmltest.u-ga.fr/item/GDZPPN002038196/