Thapar, H. S., and T. C. Pokhriyal. “Nitrogen Fixation by Some Ectomycorrhizal Fungi and Mycorrhizal Systems”. Indian Forester 119, no. 2 (February 1, 1993): 143–146. Accessed December 5, 2025. http://indianforester.co.in/index.php/indianforester/article/view/7985.