@Article{ CasEspSci9, author = { Castorina, Daniele and Esposito, Pierpaolo and Sciunzi, Berardino }, title = { Low dimensional instability for semilinear and quasilinear problems in $\mathbb{R}^N$ }, journal = { Communications on Pure and Applied Analysis }, year = { 2009 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3011/ }, note = { cvgmt preprint} }