Dutta, Arindam, Jhumoor Biswas, Soma Roychowdhury, and Subhasis Neogi. 2016. “Optimum Tilt Angles for Manual Tracking of Photovoltaic Modules”. Distributed Generation &Amp; Alternative Energy Journal 31 (02):7-35. https://doi.org/10.13052/dgaej2156-3306.3121.