@article{GDZPPN001175203, title = {New Extremal Properties for Constructing Conformal Mappings.}, journal = {Numerische Mathematik}, volume = {33}, year = {1979}, pages = {423-430}, zbl = {0432.30007}, url = {http://dml.mathdoc.fr/item/GDZPPN001175203} }
Opfer, G. New Extremal Properties for Constructing Conformal Mappings.. Numerische Mathematik, Tome 33 (1979) pp. 423-430. http://gdmltest.u-ga.fr/item/GDZPPN001175203/