Prasad, Rajendra, and Yashbir Singh. “Ecosystems and History of Evolution and Spread of Sugar Producing Plants in the World-an Overview”. International Journal of Bio-Resource and Stress Management, vol. 11, no. Aug, 4, July 2020, p. i-iv, http://ojs.pphouse.org/index.php/IJBSM/article/view/4021.