@Article{ CamMetPal0, author = { Campiti, Michele and Metafune, Giorgio and Pallara, Diego }, title = { One-dimensional Feller semigroups with reflecting barriers }, journal = { Journal of Mathematical Analysis and Applications }, year = { 2000 }, volume = { 244 }, pages = { 233-250 }, URL = { http://cvgmt.sns.it/paper/2426/ }, note = { cvgmt preprint} }