@article{DAS_2018_a15,
     author = {Jean Bourgain and Alex Kontorovich},
     title = {Beyond {Expansion} {IV:} {Traces} of {Thin} {Semigroups}},
     journal = {Discrete analysis},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DAS_2018_a15/}
}