@article{JEP_2015__2__55_0,
     author = {Massicot, Jean-Cyrille and Wagner, Frank O.},
     title = {Approximate subgroups},
     journal = {Journal de l{\textquoteright}\'Ecole polytechnique {\textemdash} Math\'ematiques},
     pages = {55--63},
     publisher = {Ecole polytechnique},
     volume = {2},
     year = {2015},
     doi = {10.5802/jep.17},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/jep.17/}
}