@article{00519528,
title = {Local and global integrability of gradients in obstacle problems.},
journal = {Annales Academiae Scientiarum Fennicae. Mathematica},
volume = {19},
year = {1994},
pages = {25-34},
zbl = {0803.35059},
language = {en},
url = {http://dml.mathdoc.fr/item/00519528}
}
Li, Gongbao; Martio, Olli. Local and global integrability of gradients in obstacle problems.. Annales Academiae Scientiarum Fennicae. Mathematica, Tome 19 (1994) pp. 25-34. http://gdmltest.u-ga.fr/item/00519528/