1. Adámek, J., Herrlich, H., Strecker, G.E.: Abstract and concrete categories: the joy of cats. In: Pure and Applied Mathematics (New York). Wiley, New York. xiv + 482. http://tac.mta.ca/tac/reprints/ articles/17/tr17abs.html. Republished in: Reprints in Theory and Applications of Categories, No. 17, pp. 1–507 (2006)
2. Adámek, J., Herrlich, H., Rosický, J., Tholen, W.: Injective hulls are not natural. Algebra Univ. 48, 379–388 (2002)
3. Alexandroff, P.S.: Outline of Set Theory and General Topology. Nauka, Moskva (1977) (in Russian)
4. Arhangel’skii, A.V., Ponomarev, V.I.: Fundamentals of General Topology: Problems and Exercises. Reidel, Dordrecht (1984) (Originally published by Izdatelstvo Nauka, Moscow (1974))
5. Bezhanishvili, G.: Stone duality and Gleason covers through de Vries duality. Topol. Appl. 157, 1064–1080 (2010)