Singh, Sujan, and P. C. Pandey. “Rolling of Logs in Felling Coupes: A Potential Disease Hazard in Coniferous Forests”. Indian Forester 115, no. 4 (April 1, 1989): 243–249. Accessed December 4, 2025. http://indianforester.co.in/index.php/indianforester/article/view/9023.