Haji, Arsalan Shareef, and Alias Barakat Khalaf. “On Cubic Interval Vague Sets and Cubic Interval Vague Topological Spaces”. Science Journal of University of Zakho, vol. 10, no. 3, July 2022, pp. 70-75, https://doi.org/10.25271/sjuoz.2022.10.3.906.