@Article{ deamonzap02, author = { De Arcangelis, Riccardo and MonsurrĂ², Sara and Zappale, Elvira }, title = { On the Relaxation and the Lavrentieff Phenomenon for Variational Integrals with Pointwise Measurable Gradient Constraints }, journal = { Calc. Var. Partial Differential Equations }, year = { 2004 }, volume = { 21 }, pages = { 357-400 }, URL = { http://cvgmt.sns.it/paper/1261/ }, note = { cvgmt preprint} }