@article{1029003136,
author = {Astala, K. and Gehring, F. W.},
title = {Quasiconformal analogues of theorems of Koebe and Hardy-Littlewood.},
journal = {Michigan Math. J.},
volume = {32},
number = {1},
year = {1985},
pages = { 99-107},
language = {en},
url = {http://dml.mathdoc.fr/item/1029003136}
}
Astala, K.; Gehring, F. W. Quasiconformal analogues of theorems of Koebe and Hardy-Littlewood.. Michigan Math. J., Tome 32 (1985) no. 1, pp. 99-107. http://gdmltest.u-ga.fr/item/1029003136/