S. Maharjan, B. B. Shrestha, and P. K. Jha, “Allelopathic Effects of Aqueous Extract of Leaves of <i>Parthenium Hysterophorus</i> L. on Seed Germination and Seedling Growth of Some Cultivated and Wild Herbaceous Species”, Sci World, vol. 5, no. 5, pp. 33–39, Feb. 2010.