%0 Journal Article %A Pascal Auscher %T On Lp estimates for square roots of second order elliptic operators on Rn. %J Publicacions Matemàtiques %D 2004 %P 159-186 %V 48 %N 1 %U https://geodesic-test.mathdoc.fr/item/PMATES_2004__48_1_41495/ %G en %F PMATES_2004__48_1_41495