@article{JEMS_2011_13_2_a6,
     author = {Giuseppe Mingione},
     title = {Gradient potential estimates},
     journal = {Journal of the European Mathematical Society},
     pages = {459--486},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {2011},
     doi = {10.4171/jems/258},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/258/}
}