[1] С. Kuratowski:
Topologie. Polska Akad. Nauk, Monografie Matematyczne, Warszawa (1958).
Zbl 0078.14603
[4] K. D. Magill, Jr.:
Subgroups of semigroups of functions. Port. Math. (26) 2 (1967), 133 - 147.
MR 0263057 |
Zbl 0174.04404
[9] K. D. Magill, Jr., S. Subbiah:
Green's relations for regular elements of sandwich semigroups, I; general results. Proc. London Math. Soc. 3 (31) (1975), 194-210.
MR 0382506 |
Zbl 0333.20051
[11] K. D. Magill, Jr., S. Subbiah:
Semigroups with exactly three regular $O$-classes. Semigroup Forum 17 (3) (1979), 279-281.
DOI 10.1007/BF02194327 |
MR 0527889
[16] J. C. Warndoff:
Topologies uniquely determined by their continuous selfmaps. Fund. Math. 66 (1969/70), 25-43.
MR 0266139