References
- P. Alexandroff, Diskrete Raume, Mat. Sb. 2 (1937), 501-519. https://doi.org/10.1070/SM1967v002n04ABEH002351
-
M. Caldas, D. N. Georgiou, S. Jafari, and T. Noiri, More on
${\delta}$ -semiopen sets, Note Mat. 22 (2003/04), no. 2, 113-126. -
M. Caldas, M. Ganster, D. N. Georgiou, S. Jafari, and S. P. Moshokoa,
${\delta}$ -semiopen sets in topology, Topology Proc. 29 (2005), no. 2, 369-383. - N. Levine, Semi-open sets and semi-continuity in topological spaces, Amer. Math. Monthly 70 (1963), 36-41. https://doi.org/10.2307/2312781
-
H. Maki, Generalized
${\Lambda}$ -sets and the associated closure operator, The special Issue in commemoration of Prof. Kazuada IKEDA's Retirement (1986), 139-146. -
J. H. Park, B. Y. Lee, and M. J. Son, On
${\delta}$ -semiopen sets in topological space, J. Indian Acad. Math. 19 (1997), no. 1, 59-67. - N. V. Velicko, H-closed topological spaces, Mat. Sb. (N.S.) 70 (112) (1966), 98-112.