@Misc{ ColFig12, author = { Colombo, Maria and Figalli, Alessio }, title = { Regularity results for very degenerate elliptic equations }, journal = { J. Math. Pures Appl. }, year = { 2012 }, pages = { }, URL = { http://cvgmt.sns.it/paper/1996/ }, note = { cvgmt preprint} }