@article{10_21136_CMJ_1977_101453,
     author = {Bican, Ladislav and Jambor, Pavel and Kepka, Tom\'a\v{s} and N\v{e}mec, Petr},
     title = {Generation of preradicals},
     journal = {Czechoslovak Mathematical Journal},
     pages = {155--166},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1977},
     doi = {10.21136/CMJ.1977.101453},
     mrnumber = {0435180},
     zbl = {0351.16002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1977.101453/}
}