@Article{ ForMetPal11, author = { Fornaro, Simona and Metafune, Giorgio and Pallara, Diego }, title = { Analytic semigroups generated in $L^p$ by elliptic operators with high order degeneracy at the boundary }, journal = { Note Mat. }, year = { 2011 }, volume = { 31 }, pages = { 101-113 }, URL = { http://cvgmt.sns.it/paper/2311/ }, note = { cvgmt preprint} }