@article{M2AN_2020__54_1_229_0,
     author = {Bonito, Andrea and Lei, Wenyu and Salgado, Abner J.},
     title = {Finite element approximation of an obstacle problem for a class of integro{\textendash}differential operators},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {229--253},
     publisher = {EDP-Sciences},
     volume = {54},
     number = {1},
     year = {2020},
     doi = {10.1051/m2an/2019058},
     mrnumber = {4055457},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/m2an/2019058/}
}