TY - JOUR AU - Amichai Eisenmann TI - Counting arithmetic subgroups and subgroup growth of virtually free groups JO - Journal of the European Mathematical Society PY - 2015 SP - 925 EP - 953 VL - 17 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4171/jems/522/ DO - 10.4171/jems/522 ID - JEMS_2015_17_4_a7 ER -