Singh, H.P., and Pramod Kumar. “Some Observations of the Genus Contignisporites Dettmann 1963”. Journal of Palaeosciences 15, no. (1-3) (December 31, 1966): 93–97. Accessed May 11, 2024. https://www.jpsonline.co.in/index.php/jop/article/view/752.