@article{CMUC_1991__32_3_a3,
     author = {Slav{\'\i}k, V\'aclav},
     title = {On the variety {Csub} $(D)$},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {431--434},
     publisher = {mathdoc},
     volume = {32},
     number = {3},
     year = {1991},
     mrnumber = {1159790},
     zbl = {0745.06003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1991__32_3_a3/}
}