Two constructions with parabolic geometries Čap, Andreas (2006) Proceedings of the 25th Winter School "Geometry and Physics"
Two results concerning biconnected sets with dispersion points Duda, R. (1962) General Topology and its Relations to Modern Analysis and Algebra
Two theorems of the descriptive theory of point sets Ponomarev, V. (1967) General Topology and its Relations to Modern Analysis and Algebra
Types of ultrafilters on countable sets Frolík, Z. (1967) General Topology and its Relations to Modern Analysis and Algebra