@article{PPN37649882X+dmdlog76, title = {Imagin\"artransformation.}, booktitle = {Geometrie Bd. 2}, series = {GDML\_Books}, year = {1968}, pages = {129}, url = {http://dml.mathdoc.fr/item/PPN37649882X+dmdlog76} }
(éd.). Imaginärtransformation., dans Geometrie Bd. 2, GDML_Books, (1968), p. 129. http://gdmltest.u-ga.fr/item/PPN37649882X+dmdlog76/