@article{1077310231, author = {Kelingos, John A.}, title = {Distortion of hyperbolic area under quasiconformal mappings}, journal = {Duke Math. J.}, volume = {41}, number = {1}, year = {1974}, pages = { 127-139}, language = {en}, url = {http://dml.mathdoc.fr/item/1077310231} }
Kelingos, John A. Distortion of hyperbolic area under quasiconformal mappings. Duke Math. J., Tome 41 (1974) no. 1, pp. 127-139. http://gdmltest.u-ga.fr/item/1077310231/