@article{GDZPPN00118248X, title = {Point Systems with Extremal Properties and Conformal Mapping.}, journal = {Numerische Mathematik}, volume = {56}, year = {1989}, pages = {125-144}, zbl = {0655.30006}, url = {http://dml.mathdoc.fr/item/GDZPPN00118248X} }
Menke, Klaus. Point Systems with Extremal Properties and Conformal Mapping.. Numerische Mathematik, Tome 56 (1989) pp. 125-144. http://gdmltest.u-ga.fr/item/GDZPPN00118248X/