@article{1077376690, author = {Agard, Stephen}, title = {An extremal problem in quasiconformal mappings}, journal = {Duke Math. J.}, volume = {33}, number = {1}, year = {1966}, pages = { 735-741}, language = {en}, url = {http://dml.mathdoc.fr/item/1077376690} }
Agard, Stephen. An extremal problem in quasiconformal mappings. Duke Math. J., Tome 33 (1966) no. 1, pp. 735-741. http://gdmltest.u-ga.fr/item/1077376690/