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@article{ELMA_1992__47_3_141526, author = {Marco Vignati}, title = {A {Geometric} {Property} of {Functions} {Harminic} in a {Disk.}}, journal = {Elemente der Mathematik}, pages = {33--38}, publisher = {mathdoc}, volume = {47}, number = {3}, year = {1992}, zbl = {0758.31001}, url = {http://geodesic.mathdoc.fr/item/ELMA_1992__47_3_141526/} }
Marco Vignati. A Geometric Property of Functions Harminic in a Disk.. Elemente der Mathematik, Tome 47 (1992) no. 3, pp. 33-38. http://geodesic.mathdoc.fr/item/ELMA_1992__47_3_141526/