Yarahmadi, D. ., and P. . Gholami. “Analysis Tourism Potentials of Kermanshah Province, Iran, in GIS Environment: A Case of Study Intensive and Extensive Ecotourism”. Pure and Applied Science Advances, vol. 3, no. 4, Apr. 2014, pp. 223-3, https://sjournals.com/index.php/sjpas/article/view/912.