@Misc{ BraParSqu15, author = { Brasco, Lorenzo and Parini, Enea and Squassina, Marco }, title = { Stability of variational eigenvalues for the fractional $p-$Laplacian }, journal = { Discrete Contin. Dyn. Syst. }, year = { 2015 }, pages = { 35 }, URL = { http://cvgmt.sns.it/paper/2649/ }, note = { cvgmt preprint} }