@article{CMUC_1975__16_2_a0,
     author = {Bican, Ladislav and Jambor, Pavel and Kepka, Tom\'a\v{s} and N\v{e}mec, Petr},
     title = {Preradicals and change of rings},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {201--217},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {1975},
     mrnumber = {0374179},
     zbl = {0305.16017},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1975__16_2_a0/}
}