Sabah A. Tamer, Taha H. Jasim. ζ-Open Sets and ζ-Continuity. Tikrit J. Pure Sci. [Internet]. 2023 Jun. 25 [cited 2024 May 21];28(3):96-100. Available from: https://tjps.tu.edu.iq/index.php/tjps/article/view/1431