@article{MM2_1986__56_155167,
     author = {F. Duzaar and M. Fuchs},
     title = {Optimal {Regularity} {Theorems} for {Variational} {Problems} with {Obstacles.}},
     journal = {Manuscripta mathematica},
     pages = {209--234},
     publisher = {mathdoc},
     volume = {56},
     year = {1986},
     zbl = {0605.49006},
     url = {http://geodesic.mathdoc.fr/item/MM2_1986__56_155167/}
}