@article{10_21136_MB_1999_126244,
     author = {Ziemer, William P. and Zumbrun, Kevin},
     title = {The obstacle problem for functions of least gradient},
     journal = {Mathematica Bohemica},
     pages = {193--219},
     publisher = {mathdoc},
     volume = {124},
     number = {2-3},
     year = {1999},
     doi = {10.21136/MB.1999.126244},
     mrnumber = {1780692},
     zbl = {0936.49024},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1999.126244/}
}