[1] E. Čech: Topological spaces. Revised by Z. Frolík and M. Katětov. Academia, Praha, 1966. MR 0211373

[2] R. Frič: Sequential envelope and subspaces of the Čech-Stone compactification. General Topology and its Relations to Modern Analysis and Algebra III, Proc. Third Prague Topological Sympos., 1971. Academia, Praha, 1972, 123 - 126. MR 0353260

[3] R. Frič: On $E$-sequentially regular spaces. Czechoslovak Math. J. 26 (101) (1976), 604-612. MR 0428240

[4] L. Gillman, M. Jerison: Rings of continuous functions. Van Nostrand, Princeton, 1960, MR 0116199 | Zbl 0093.30001

[5] J. Kim: Sequentially complete spaces. J. Korean Math. Soc. 9 (1972), 39 - 43. MR 0303508 | Zbl 0242.54024

[6] V. Koutník: On sequentially regular convergence spaces. Czechoslovak Math. J. 17 (92) (1967), 232-247. MR 0215277

[7] J. Novák: On convergence spaces and their sequential envelopes. Czechoslovak Math. J. 15 (90) (1965), 74-100. MR 0175083

[8] J. Novák: On sequential envelopes defined by means of certain classes of continuous functions. Czechoslovak Math. J. 18 (93) (1968), 450-456. MR 0232335