Özendi, Mustafa, and Alper Yılmaz. “CLASSIFICATION OF VIEWPOINT INDEPENDENT IMAGE GROUPS”. Journal of Aeronautics and Space Technologies 6, no. 1 (January 21, 2013): 87-94. Accessed May 16, 2021. http://www.jast.hho.edu.tr/index.php/JAST/article/view/232.