@Article{ FusMukZha18, author = { Fusco, Nicola and Mukherjee, Shirsho and Zhang, Yi Ru-Ya }, title = { A variational characterisation of the second eigenvalue of the p-Laplacian on quasi open sets }, journal = { Proc. London Math. Soc. }, year = { 2019 }, doi = { 10.1112/plms.12240 }, volume = { 3 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3925/ }, note = { cvgmt preprint} }