@article{GDZPPN002082926,
title = {A Geometric Property of Functions Harminic in a Disk.},
journal = {Elemente der Mathematik},
volume = {47},
year = {1992},
pages = {33-38},
zbl = {0758.31001},
url = {http://dml.mathdoc.fr/item/GDZPPN002082926}
}
Vignati, Marco. A Geometric Property of Functions Harminic in a Disk.. Elemente der Mathematik, Tome 47 (1992) pp. 33-38. http://gdmltest.u-ga.fr/item/GDZPPN002082926/