@article{AIHPC_2017__34_4_845_0,
     author = {Koch, Herbert and R\"uland, Angkana and Shi, Wenhui},
     title = {The variable coefficient thin obstacle problem: {Optimal} regularity and regularity of the regular free boundary},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {845--897},
     publisher = {Elsevier},
     volume = {34},
     number = {4},
     year = {2017},
     doi = {10.1016/j.anihpc.2016.08.001},
     mrnumber = {3661863},
     zbl = {1435.35421},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2016.08.001/}
}