Devkota, Anjana, and Swasti Sharma. “Allelopathic Potential of Medicinal Plants: Costus Speciosus Koen Ex. Retz and Justicia Adhatoda Linn”. Journal of Natural History Museum 28 (December 19, 2015): 57–65. Accessed May 5, 2024. https://www.nepjol.info/index.php/JNHM/article/view/14168.