Pratama, Agung, and Rakhmat Kurniawan. “Sales Forecasting of Pet Food at Oyen Petshop Using the Fuzzy Time series–markov Chain Method ”. Journal of Intelligent Decision Support System (IDSS) 8, no. 4 (December 30, 2025): 198-207. Accessed April 18, 2026. https://idss.iocspublisher.org/index.php/jidss/article/view/327.