@article{MM2_1979__28_154633,
     author = {Mariano Giaquinta and Guiseppe Modica},
     title = {Almost-Everywhere {Regularity} {Results} for {Solutions} of {Non} {Linear} {Elliptic} {Systems.}},
     journal = {Manuscripta mathematica},
     pages = {109--158},
     publisher = {mathdoc},
     volume = {28},
     year = {1979},
     zbl = {0411.35018},
     url = {http://geodesic.mathdoc.fr/item/MM2_1979__28_154633/}
}