Mehrotra, P., P. Mehrotra, and J. Ram. “The Pattern of Resource Allocation in Wild Herbs of Early (chir Pine) and Late Successional (oak) Communities in Central Himalaya”. Oecologia Montana, Vol. 10, no. 1-2, Dec. 2001, pp. 19-23, https://om.vuvb.uniza.sk/index.php/OM/article/view/128.