@article{GDZPPN002280094, title = {The internal problems of two-dimensional potential theory}, journal = {Mathematische Annalen}, volume = {116}, year = {1939}, pages = {374-400}, zbl = {65.0422.01}, url = {http://dml.mathdoc.fr/item/GDZPPN002280094} }
Morris, R.M. The internal problems of two-dimensional potential theory. Mathematische Annalen, Tome 116 (1939) pp. 374-400. http://gdmltest.u-ga.fr/item/GDZPPN002280094/