@Article{ palsavval11, author = { Palatucci, Giampiero and Savin, Ovidiu and Valdinoci, Enrico }, title = { Local and global minimizers for a variational energy involving a fractional norm }, journal = { Ann. Mat. Pura Appl. }, year = { 2013 }, doi = { 10.1007/s00526-013-0656-y }, volume = { 192 }, number = { 4 }, pages = { 673-718 }, URL = { http://cvgmt.sns.it/paper/1654/ }, note = { cvgmt preprint} }