%0 Journal Article %A Hollister, Herbert A. %T An infinite collection of absolutely convex subgroups %J Czechoslovak Mathematical Journal %D 1992 %P 311-312 %V 42 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128329/ %R 10.21136/CMJ.1992.128329 %G en %F 10_21136_CMJ_1992_128329