@article{GDZPPN002064359,
title = {Level sets of univalent functions.},
journal = {Commentarii mathematici Helvetici},
volume = {56},
year = {1981},
pages = {366-403},
zbl = {0473.30012},
url = {http://dml.mathdoc.fr/item/GDZPPN002064359}
}
Hayman, W.K.; Wu, J.-M.G. Level sets of univalent functions.. Commentarii mathematici Helvetici, Tome 56 (1981) pp. 366-403. http://gdmltest.u-ga.fr/item/GDZPPN002064359/