Xingxue, Li. “14th Birbal Sahni Memorial Lecture: The Mixed Permian Cathaysia-Gondwana Flora”. Journal of Palaeosciences 35, no. (1-3) (December 31, 1986): 211–222. Accessed November 24, 2024. https://jpsonline.co.in/index.php/jop/article/view/1532.