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