@article{ADM_2010_9_2_a4,
     author = {A. I. Kashu},
     title = {Preradicals and characteristic submodules: connections and operations},
     journal = {Algebra and discrete mathematics},
     pages = {61--77},
     year = {2010},
     volume = {9},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2010_9_2_a4/}
}