Fitriani, Lili, Clara Alverina Simbolon, and Erizal Zaini. “Preparation and Characterization of Multicomponent Crystal Piperine-Caffeine”. Jurnal Sains Farmasi & Klinis 10, no. 3 (December 29, 2023): 353–358. Accessed March 2, 2026. https://jsfk.ffarmasi.unand.ac.id/index.php/jsfk/article/view/1521.