@article {bonito2020finite,
	title = {Finite element approximation of an obstacle problem for a class of integro{\textendash}differential operators},
	journal = {ESAIM: Mathematical Modelling and Numerical Analysis},
	volume = {54},
	number = {1},
	year = {2020},
	pages = {229{\textendash}253},
	publisher = {EDP Sciences},
	author = {Bonito, Andrea and Wenyu Lei and Salgado, Abner J}
}
