@Article{ CupMarMas14, author = { Cupini, Giovanni and Marcellini, Paolo and Mascolo, Elvira }, title = { Existence and regularity for elliptic equations under $p,q$-growth }, journal = { Adv. Differential Equations }, year = { 2014 }, volume = { 19 }, pages = { 693–724 }, URL = { http://cvgmt.sns.it/paper/2422/ }, note = { cvgmt preprint} }