@article{10_21136_CMJ_1995_128544,
     author = {Zhang, Yue Hui},
     title = {Unique covering on radical classes of $\ell$-groups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {435--441},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1995},
     doi = {10.21136/CMJ.1995.128544},
     mrnumber = {1344508},
     zbl = {0841.06016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1995.128544/}
}