%0 Journal Article %A A. I. Kashu %T Closure operators in the categories of modules. Part~IV (Relations between the operators and preradicals) %J Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica %D 2014 %P 13-22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/BASM_2014_3_a1/ %G en %F BASM_2014_3_a1