On selecting of morphisms among all mappings between underlying sets of objects in concrete categories and realisations of these
A remark on selective functors
An analogon of the fixed-point theorem and its application for graphs
On full embeddings of concrete categories with respect to forgetful functors
Tensor products in the category of graphs
On the homology theory of discrete spaces
A remark on common fixed sets of commuting mappings
Concerning universal categories
Extending tensor products to structures of closed categories
Limits of functors and realisations of categories
Fuzzy mappings and fuzzy sets
Pointless uniformities. II: (Dia)metrization
Pointless uniformities. I. Complete regularity
Fuzziness and fuzzy equality
Diameters in locales: How bad they can be
On simply bireflective subcategories
Equationally close subframes and representation of quotient spaces
Peculiar behavior of connected locales
Primitive classes of algebras with two unary idempotent operations, containing all algebraic categories as full subcategories
On realization and boundability of concrete categories in which the morphisms are choiced by local conditions
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