Lee, Y. M. ., Cheng, C. C. X. . and Lai Chun Wong (2025) “High-Performance Liquid Chromatography Analysis of Caffeine and Trigonelline in Instant Coffee: A Malaysian Market Study”, Malaysian Journal of Science (MJS), 44(4), pp. 40–52. doi: 10.22452/mjs.vol44no4.5.