Jabbar Hassoon Hasan, Ammar Shaker, Amer D. Salman, Hossein M. Rizeei. “Comparison Between Object-Based and Pixel-Based Classification Methods Upon High Resolution Quickbird Image”. Design Engineering, July 2021, pp. 2817 -33, http://thedesignengineering.com/index.php/DE/article/view/3021.