1. Ball, R.N., Walters-Wayland, J.: $$C$$- and $$C^*$$-quotients in pointfree topology. Dissertationes Mathematicae (Rozprawy Mat.) 412, 1–62 (2002)
2. Banaschewski, B.: The real numbers in pointfree topology. In: Textos de Matemática, vol. 12. University of Coimbra, Coimbra (1997)
3. Banaschewski, B.: Uniform completion in pointfree topology. In: Topological and Algebraic Structures in Fuzzy Sets, Trends Log. Stud. Log. Libr., vol. 20, pp. 19–56. Kluwer Acad. Publ., Dordrecht (2003)
4. Birkhoff, G.: Lattice Theory, 3rd edn. AMS Colloquium Publications (1967)
5. Erné, M.: Adjunctions and Galois connections: origins, history and development. In: Denecke, K., Erné, M., Wismath, S.L. (eds.) Galois Connections and Applications, pp. 1–138. Kluwer Academic Publishers, Dordrecht–Boston–London (2004)