@article{MM2_1990__68_2_155529,
     author = {Luigi Ambrosio},
     title = {Regularity of solutions fo a degenerate elliptic variational problem.},
     journal = {Manuscripta mathematica},
     pages = {309--326},
     publisher = {mathdoc},
     volume = {68},
     number = {2},
     year = {1990},
     zbl = {0716.49031},
     url = {http://geodesic.mathdoc.fr/item/MM2_1990__68_2_155529/}
}