Ari Octaviyan, Hofman Darmawan, Hidayatul Nurohmah, Machrus Ali, and Rusklin. 2018. “Optimasi Dual Axis Tracking Untuk Photovoltaic Berbasis Firefly Algorithm Dan Ant Colony Optimization”. SinarFe7 1 (1):177-82. https://journal.fortei7.org/index.php/sinarFe7/article/view/168.