08-10
- : An example concerning set-functors. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 2, pp. 227-233
- : A shrinking of a category of societies is a universal partly ordered class. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 12 (1971), issue 2, pp. 401-411
- : On the category of filters. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 1, pp. 19-29
- : ${\frak A} (1,1)$ can be strongly embedded into category of semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 2, pp. 257-262
- : A remark on selective functors. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 1, pp. 191-196
- : Strong embedding of category of all groupoids into category of semigroups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 9 (1968), issue 2, pp. 251-256
- : Category of commutative groupoids is binding. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 8 (1967), issue 4, pp. 753-755
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