@article{GDZPPN002062712, title = {Univalent functions and the Schwarzian derivative.}, journal = {Commentarii mathematici Helvetici}, volume = {52}, year = {1977}, pages = {561-572}, zbl = {0373.30013}, url = {http://dml.mathdoc.fr/item/GDZPPN002062712} }
Gehring, F.W. Univalent functions and the Schwarzian derivative.. Commentarii mathematici Helvetici, Tome 52 (1977) pp. 561-572. http://gdmltest.u-ga.fr/item/GDZPPN002062712/