@article{1102992702, author = {Sweeney, W. J.}, title = {``The $\delta $-Poincar\'e estimate''.}, journal = {Pacific J. Math.}, volume = {23}, number = {3}, year = {1967}, pages = { 559-570}, language = {en}, url = {http://dml.mathdoc.fr/item/1102992702} }
Sweeney, W. J. ``The $\delta $-Poincaré estimate''.. Pacific J. Math., Tome 23 (1967) no. 3, pp. 559-570. http://gdmltest.u-ga.fr/item/1102992702/