@article{GDZPPN002469685, title = {Spiegelung am elliptischen Paraboloid.}, journal = {Monatshefte f\"ur Mathematik}, volume = {52}, year = {1948}, pages = {13-37}, zbl = {0031.07101}, url = {http://dml.mathdoc.fr/item/GDZPPN002469685} }
Wunderlich, Walter. Spiegelung am elliptischen Paraboloid.. Monatshefte für Mathematik, Tome 52 (1948) pp. 13-37. http://gdmltest.u-ga.fr/item/GDZPPN002469685/