@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/