@Misc{ CasPac5, author = { Castorina, Daniele and Pacella, Filomena }, title = { Symmetry of positive solutions of an almost-critical problem in an annulus }, journal = { Calculus of Variations and Partial Differential Equations }, year = { 2005 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3005/ }, note = { cvgmt preprint} }