On a mechanism of defining morphisms in concrete categories L. Kučera; A. Pultr — 1972 Cahiers de Topologie et Géométrie Différentielle Catégoriques
The category of compact Hausdorff spaces is not algebraic if there are too many measurable cardinals Kučera, L.; Pultr, A. — 1972 General Topology and its Relations to Modern Analysis and Algebra
On a mechanism of choosing morphisms in concrete categories Kučera, L.; Pultr, A. — 1972 General Topology and its Relations to Modern Analysis and Algebra