Mammadov, F., U. Samadova, and O. Salamov. “Experimental Results of Using a Parabolic Trough Solar Collector for Thermal Treatment of Crude Oil”. Journal of Energy in Southern Africa 19, no. 1 (February 1, 2008): 70–76. Accessed April 2, 2025. https://energyjournal.africa/article/view/3316.