[1] B. Banaschewski, C. J. Mulvey: Stone-Čech compactifications of locales,I. Houston J. Math. 6 (1980), 301-312. MR 0597771

[2] C. H. Dowkeг, D. Strauss: Separation axioms for frames. Coll. Math. Soc. János Bolyai 8 (1974), 223-240. MR 0394559

[3] C. H. Dowkeг, D. Strauss: Sums in the category of frames. Houston J. Math. 3 (1976), 17-32. MR 0442900

[4] P. T. Johnstone: Stone spaces. Cambridge University Press, 1982. MR 0698074 | Zbl 0499.54001

[5] P. T. Johnstone, Sun Shu-Hao: Weak products and Hausdorff locales. preprint. Zbl 0656.18010

[б] M. Katětov: A note on semiregular and nearly regular spaces. Časopis pěst. mat., 72 (1947), 97-99. MR 0024610

[7] J. Paseka, B. Šmarda: $T_2$-frames and almost compact frames. Czech. Math. J. (in pгint).

[8] J. Rosický, B. Šmarda: $T_1$-locales. Math. Proc. Cambridge Philos. Soc. 98 (1985), 81-86. MR 0789721

[9] H. Simmons: The lattice theoretic part of topological separation properties. Pгoc. Edinburgh Math. Soc. (2) 21 (1978), 41-48. MR 0493959 | Zbl 0396.54014

[10] S. Willard: General topology. Addison-Wesley, Reading, MA, 1970. MR 0264581 | Zbl 0205.26601