@article{GDZPPN002060183, title = {Comparison Domains for the Problem of the Angular Derivative}, journal = {Commentarii mathematici Helvetici}, volume = {46}, year = {1971}, pages = {98-112}, zbl = {0207.07705}, url = {http://dml.mathdoc.fr/item/GDZPPN002060183} }
Eke, B.G. Comparison Domains for the Problem of the Angular Derivative. Commentarii mathematici Helvetici, Tome 46 (1971) pp. 98-112. http://gdmltest.u-ga.fr/item/GDZPPN002060183/