Shrestha, Suraj, Nibedita Chaudhary, Rajkumari Sah, and Neera Malakar. “Analysis of Piperine in Black Pepper by High Performance Liquid Chromatography”. Journal of Nepal Chemical Society 41, no. 1 (August 5, 2020): 80-86. Accessed April 11, 2021. https://www.nepjol.info/index.php/JNCS/article/view/30492.