@article{1077307370, author = {C\'ordoba, A.}, title = {The disc multiplier}, journal = {Duke Math. J.}, volume = {58}, number = {1}, year = {1989}, pages = { 21-29}, language = {en}, url = {http://dml.mathdoc.fr/item/1077307370} }
Córdoba, A. The disc multiplier. Duke Math. J., Tome 58 (1989) no. 1, pp. 21-29. http://gdmltest.u-ga.fr/item/1077307370/