@article{GDZPPN002398281, title = {Extreme Harmonic Functions and Boundary Value Problems.II.}, journal = {Mathematische Zeitschrift}, volume = {93}, year = {1966}, pages = {256-270}, zbl = {0147.10102}, url = {http://dml.mathdoc.fr/item/GDZPPN002398281} }
Gowrisankaran, Kohur. Extreme Harmonic Functions and Boundary Value Problems.II.. Mathematische Zeitschrift, Tome 93 (1966) pp. 256-270. http://gdmltest.u-ga.fr/item/GDZPPN002398281/