@article{10_1007_s10492_013_0027_1,
     author = {Bigolin, Francesco},
     title = {Regularity results for a class of obstacle problems in {Heisenberg} groups},
     journal = {Applications of Mathematics},
     pages = {531--554},
     publisher = {mathdoc},
     volume = {58},
     number = {5},
     year = {2013},
     doi = {10.1007/s10492-013-0027-1},
     mrnumber = {3104617},
     zbl = {06282095},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-013-0027-1/}
}