Cahyandari, Rini, Sukono, Riaman, and Nurnadiah Zamri. “Discrete-Time Surplus Process Model With Multiple Threshold Levels for the Productive Waqf-Based Crab Cracker Industry: Theory and Simulation”. Statistics, Optimization & Information Computing (October 6, 2026). Accessed October 15, 2026. https://iapress.org/index.php/soic/article/view/3820.