Wahyu Cahyono, Mahrus Ali, Hidayatul Nurohmah, and Budiman. “Ant Colony Optimazation Sebagai Tuning PID Pada Single Axis Tracking Photovoltaic”. SinarFe7, vol. 2, no. 1, Aug. 2019, pp. 455-8, https://journal.fortei7.org/index.php/sinarFe7/article/view/482.