@article{10_1090_S0894_0347_1992_1124980_8,
     author = {Caffarelli, Luis A.},
     title = {The regularity of mappings with a convex potential},
     journal = {Journal of the American Mathematical Society},
     pages = {99--104},
     year = {1992},
     volume = {05},
     number = {1},
     doi = {10.1090/S0894-0347-1992-1124980-8},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1992-1124980-8/}
}