%0 Journal Article %A Jakubík, Ján %T Closure operators on the lattice of radical classes of lattice ordered groups %J Czechoslovak Mathematical Journal %D 1988 %P 71-77 %V 38 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1988.102201/ %R 10.21136/CMJ.1988.102201 %G en %F 10_21136_CMJ_1988_102201