Kurniadi, Felix, and Vinnia Kemala Putri. “Gray Level Co-Ocurence Matrix for Feature Extracting of Cirebon Mask”. Ultimatics : Jurnal Teknik Informatika 12, no. 1 (July 2, 2020): 20-24. Accessed September 19, 2020. http://ejournals.umn.ac.id/index.php/TI/article/view/1507.