Dogra, Kuldip S., et al. “Distribution, Biology and Ecology of Parthenium Hysterophorus L. (Congress Grass) an Invasive Species in the North-Western Indian Himalaya (Himachal Pradesh)”. Global Journal of Food and Agribusiness Management, vol. 2, no. 1, Nov. 2012, pp. 124-9, https://elixirpublishers.in/index.php/asst/article/view/2539.