Pokhrel, Prashanta, Suraj Shrestha, Som Kanta Rijal, and Krishna Prasad Rai. 2016. “A Simple HPLC Method for the Determination of Caffeine Content in Tea and Coffee”. Journal of Food Science and Technology Nepal 9 (December):74-78. https://doi.org/10.3126/jfstn.v9i0.16200.