@article{10_1090_jams_896,
     author = {Chernikov, Artem and Simon, Pierre},
     title = {Definably amenable {NIP} groups},
     journal = {Journal of the American Mathematical Society},
     pages = {609--641},
     publisher = {mathdoc},
     volume = {31},
     number = {3},
     year = {2018},
     doi = {10.1090/jams/896},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/jams/896/}
}