@Article{ BraRuf15, author = { Brasco, Lorenzo and Ruffini, Berardo }, title = { Compact Sobolev embeddings and torsion functions }, journal = { Ann. Inst. H. Poincaré Anal. Non Linéaire }, year = { 2015 }, pages = { 29 }, URL = { http://cvgmt.sns.it/paper/2700/ }, note = { cvgmt preprint} }