1. Mémoire sur les espaces topologiques compacts;Alexandroff;Nederl. Akad. Wetensch. Proc. Ser. A,1929
2. On minimal π-character of points in extremally disconnected spaces;Balcar;Topology Appl.,1991
3. Reaping number and π-character of Boolean algebras;Balcar;Discrete Math.,1992
4. Sur les espaces compacts;Čech;Publ. Fac. Sci. Univ. Masaryk Brno,1938
5. Reaping numbers of Boolean algebras;Dow;Bull. London Math. Soc.,1996