@article{CMUC_1989__30_4_a19, author = {\v{C}uda, Karel}, title = {On the adjunction of any semiset to the system of $Sd_V$-classes in {AST}}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {775--778}, publisher = {mathdoc}, volume = {30}, number = {4}, year = {1989}, mrnumber = {1045908}, zbl = {0696.03027}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1989__30_4_a19/} }