@Article{ bec, author = { Beck, Lisa }, title = { Boundary regularity results for variational integrals }, journal = { Q. J. Math. }, year = { 2010 }, doi = { 10.1093/qmath/haq019 }, volume = { 62 }, number = { 4 }, pages = { 791-824 }, URL = { http://cvgmt.sns.it/paper/813/ }, note = { cvgmt preprint} }