Yousif Alkhayat, Rayan, and Basil Younis Thanoon. 2005. “Fractal Dimension Calculation for the General Shapes of ‎Geographical Maps and Closed Curves”. AL-Rafidain Journal of Computer Sciences and Mathematics 2 (1):99-114. https://doi.org/10.33899/csmj.2005.164076 .