@Misc{ DePFigSav12, author = { De Philippis, Guido and Figalli, Alessio and Savin, Ovidiu }, title = { A note on interior $W^{2,1+\varepsilon}$ estimates for the Monge-Ampere equation }, journal = { Math. Ann. }, year = { 2012 }, pages = { }, URL = { http://cvgmt.sns.it/paper/1777/ }, note = { cvgmt preprint} }