%0 Journal Article %A Darnel, Michael R. %T Closure operators on radical classes of lattice-ordered groups %J Czechoslovak Mathematical Journal %D 1987 %P 51-64 %V 37 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1987.102134/ %R 10.21136/CMJ.1987.102134 %G en %F 10_21136_CMJ_1987_102134