Maheshwari, H.K., and Usha Bajpai. “An Abnormal Megaspore from Lower Permian Coal Measures Near Lake Tanganyika, Zaire”. Journal of Palaeosciences 35, no. (1-3) (December 31, 1986): 175–177. Accessed April 30, 2024. https://jpsonline.co.in/index.php/jop/article/view/1525.