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@article{CMH_1959__33_139162, author = {Maurice Heins}, title = {On the {Principle} of {Harmonic} {Measure.}}, journal = {Commentarii mathematici Helvetici}, pages = {47--58}, publisher = {mathdoc}, volume = {33}, year = {1959}, zbl = {0083.06903}, url = {http://geodesic.mathdoc.fr/item/CMH_1959__33_139162/} }
Maurice Heins. On the Principle of Harmonic Measure.. Commentarii mathematici Helvetici, Tome 33 (1959), pp. 47-58. http://geodesic.mathdoc.fr/item/CMH_1959__33_139162/