@article{GDZPPN002062755, title = {An extremal problem for harmonic measure.}, journal = {Commentarii mathematici Helvetici}, volume = {52}, year = {1977}, pages = {611-624}, zbl = {0379.30010}, url = {http://dml.mathdoc.fr/item/GDZPPN002062755} }
Huckemann, Friedrich. An extremal problem for harmonic measure.. Commentarii mathematici Helvetici, Tome 52 (1977) pp. 611-624. http://gdmltest.u-ga.fr/item/GDZPPN002062755/