%0 Journal Article %A Andrea Cianchi %A Vladimir G. Maz'ya %T Gradient regularity via rearrangements for $p$-Laplacian type elliptic boundary value problems %J Journal of the European Mathematical Society %D 2014 %P 571-595 %V 16 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/440/ %R 10.4171/jems/440 %F JEMS_2014_16_3_a3