Bose, M.N., and S.K. Roy. “On the Occurrence of Pachypteris in the Jabalpur Series of India”. Journal of Palaeosciences 16, no. (1-3) (December 31, 1967): 1–9. Accessed November 25, 2024. https://jpsonline.co.in/index.php/jop/article/view/499.