@article{GDZPPN002059215,
title = {Remarks on the Koebe Kreisnormierungsproblem.},
journal = {Commentarii mathematici Helvetici},
volume = {43},
year = {1968},
pages = {289-295},
zbl = {0172.37601},
url = {http://dml.mathdoc.fr/item/GDZPPN002059215}
}
Sibner, Robert J. Remarks on the Koebe Kreisnormierungsproblem.. Commentarii mathematici Helvetici, Tome 43 (1968) pp. 289-295. http://gdmltest.u-ga.fr/item/GDZPPN002059215/