TY - JOUR AU - Avramidi, Grigori TI - Periodic flats and group actions on locally symmetric spaces JO - Geometry & topology PY - 2013 SP - 311 EP - 327 VL - 17 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.2140/gt.2013.17.311/ DO - 10.2140/gt.2013.17.311 ID - GT_2013_17_1_a7 ER -