Karna, Pushpa. 2017. “Cytological Studies on Two Species, Xanthium Strumarium Linn. and Bidens Pilosa Linn. Var. Minor (Blume) Sherff (Asteraceae-Heliantheae) from Nepal”. International Journal of Applied Sciences and Biotechnology 5 (1), 66-71. https://doi.org/10.3126/ijasbt.v5i1.17010.