Sabry, M S., and B W. Raichle. “Characteristics of Residential Tracker Accuracy in Quantified Direct Beam Irradiance and Global Horizontal Irradiance”. Journal of Technology Innovations in Renewable Energy 3, no. 2 (May 28, 2014): 44–57. Accessed December 28, 2024. http://lifescienceglobalca.com/index.php/jtire/article/view/2011.