Sharma, D. N., S. M. Tripathi, and A. K. Srivastava. “Pteridophytic Flora of the Forests of Gorakhpur District”. Indian Forester 95, no. 8 (August 1, 1969): 526–531. Accessed December 4, 2025. http://indianforester.co.in/index.php/indianforester/article/view/26135.