Baig, M. J., M. J. . Iqbal, S. M. F. Riaz, and S. T. . Iqbal. “ Cloud Cover”. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences, vol. 55, no. 3, Sept. 2018, pp. 9-18, http://ppaspk.org/index.php/PPAS-B/article/view/159.