@Article{ cupfor, author = { Cupini, Giovanni and Fornaro, Simona }, title = { Maximal regularity in $L^p(\mathbb{R}^N)$ for a class of elliptic operators with unbounded coefficients }, journal = { Differential Integral Equations }, year = { 2004 }, volume = { 17 }, pages = { 259-296 }, URL = { http://cvgmt.sns.it/paper/1265/ }, note = { cvgmt preprint} }