1. Birkhoff, G.: Lattice Theory, Colloquium Publications, vol. 25. American Mathematical Society (1967)
2. Bourbaki, N.: General topology. In: Chapters 1–4, Elements of Mathematics (Berlin), 1st edn. 1974, reprinted 2nd edn. Springer-Verlag, Berlin (1998)
3. Bruns, G., Lakser, H.: Injective hulls of semilattices. Canad. Math. Bull. 13(1), 115–118 (1970)
4. Coumans, D.C.S.: Canonical Extensions in Logic: Some Applications and a Generalisation to Categories. Dissertation, Radboud University Nijmegen (2012)
5. Császár, A.: D-completions of pervin-type quasi-uniformities. Acta. Sci. Math. (Szeged) 57, 329–335 (1993)