Yousif, M. K. ., and M. S. . Kasim. “Numerical and Experimental Study on Effect of Adding Vaseline and Paraffin on the Performance of Concentrated Photovoltaic Cells”. International Journal of Innovative Analyses and Emerging Technology, vol. 2, no. 12, Dec. 2022, pp. 23-36, https://openaccessjournals.eu/index.php/ijiaet/article/view/1726.