%0 Journal Article %A Avramidi, Grigori %T Periodic flats and group actions on locally symmetric spaces %J Geometry & topology %D 2013 %P 311-327 %V 17 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.2013.17.311/ %R 10.2140/gt.2013.17.311 %F GT_2013_17_1_a7