@Article{ dalskr00, author = { Dal Maso, Gianni and Skrypnik, Igor V. }, title = { A monotonicity approach to nonlinear Dirichlet problems in perforated domains }, journal = { Adv. Math. Sci. Appl. }, year = { 2001 }, volume = { 11 }, pages = { 721-751 }, URL = { http://cvgmt.sns.it/paper/868/ }, note = { cvgmt preprint} }