Janin Z, Mad Kaidi H, Ahmad R, Khan S. Derivative Proportional – Integral Controller Using Nelder-Mead Optimization for Glycerine Purification Heating Process. IJIE [Internet]. 2020 Jul. 19 [cited 2026 Apr. 14];12(6):200-6. Available from: https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/6605