Bhattacharyya, G., G. C. Joshi, and L. M. Tewari. “Invasive Effect of Exotic Pines : A Case Study in Kalika Forest”. Indian Forester 136, no. 12 (December 1, 2010): 1699–1703. Accessed December 5, 2025. http://indianforester.co.in/index.php/indianforester/article/view/12773.