Salehin, Nur Suhadah, Mohd Hafiz A.Jalil, Rohaiza Hamdan, Aqilaa Silmi Amron, and Rafidah Ngadengon. 2021. “Linear Quadratic Control for Temperature Regulation of Solar Herb Drying System”. Evolution in Electrical and Electronic Engineering 2 (2):615-20. https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/3890.