Saed Mallak, Deema Abdoh. “Predicting the Behavior of Gold Price Using Markov Chains and Markov Chains of the Fuzzy States”. Mathematical Statistician and Engineering Applications 71, no. 4 (September 19, 2022): 2906–2920. Accessed December 7, 2025. https://philstat.org/index.php/MSEA/article/view/852.