1. Al-Zoubi, K. Y. On generalized ω-closed sets. Int. J. Math. Math. Sci., 13 (2005), 2011–2021.
2. Al-Zoubi, K. Y., and Al-Nashef, B. The topology of ω-open subsets. Al-Manarah Journal 9, 2 (2003), 169–179.
3. Balasubramanian, G. On some generalizations of compact spaces. Glas. Mat. Ser. III 17(37), 2 (1982), 367–380.
4. Cammaroto, F., and Santoro, G. Some counterexamples and properties on generalizations of Lindelöf spaces. Internat. J. Math. Math. Sci. 19, 4 (1996), 737–746.
5. Engelking, R. Outline of general topology. Translated from the Polish by K. Sieklucki. North-Holland Publishing Co., Amsterdam; PWN-Polish Scientific Publishers, Warsaw; Interscience Publishers Division John Wiley & Sons, Inc., New York, 1968.