On generalized ω -closed sets. Al-Zoubi, Khalid Y. — 2005 International Journal of Mathematics and Mathematical Sciences
On P 3 -paracompact spaces. Al-Zoubi, Khalid; Al-Ghour, Samer — 2007 International Journal of Mathematics and Mathematical Sciences
I -Lindelöf spaces. Al-Zoubi, Khalid; Al-Nashef, Bassam — 2004 International Journal of Mathematics and Mathematical Sciences