@article{MM2_1989__63_3_155389,
     author = {Martin Fuchs},
     title = {P-Harmonic obstacle problems.},
     journal = {Manuscripta mathematica},
     pages = {381--420},
     year = {1989},
     volume = {63},
     number = {3},
     zbl = {0715.49004},
     url = {http://geodesic.mathdoc.fr/item/MM2_1989__63_3_155389/}
}