E HERTZOG, Pierre; J SWART, Arthur. Optimum Tilt Angles for PV Modules in a Semi-Arid Region of the Southern Hemisphere. International Journal of Engineering & Technology, [S. l.], v. 7, n. 4.15, p. 290–297, 2018. DOI: 10.14419/ijet.v7i4.15.23010. Disponível em: https://sciencepubco.com/index.php/ijet/article/view/23010.. Acesso em: 2 may. 2024.