@article{2242, author = {Tillmann, Heinz-G\"unther}, title = {Dualit\"at in der potentialtheorie}, journal = {Portugaliae mathematica}, volume = {13}, year = {1954}, pages = {55-86}, zbl = {0056.33403}, mrnumber = {0067362}, language = {de}, url = {http://dml.mathdoc.fr/item/2242} }
Tillmann, Heinz-Günther. Dualität in der potentialtheorie. Portugaliae mathematica, Tome 13 (1954) pp. 55-86. http://gdmltest.u-ga.fr/item/2242/