Tubagus Fahmi, Delief Wilda Khaidir, Macrus Ali, and Rukhslin. “Optimasi Single Axis Tracking Untuk Solar Cell Berbasis Bat Algorithm”. SinarFe7, vol. 2, no. 1, Aug. 2019, pp. 357-60, https://journal.fortei7.org/index.php/sinarFe7/article/view/462.