Triyasmono, Liling, Isni Munisa, Khoerul Anwar, Totok Wianto, Heri Budi Santoso, and Abdul Rohman. “Identification and Authentication of Eurycoma Longifolia Root Extract from Zingiber Officinale Rhizome Using FTIR Spectroscopy and Chemometrics”. Indonesian Journal of Chemometrics and Pharmaceutical Analysis 1, no. 2 (July 29, 2021): 69-77. Accessed July 3, 2024. https://journal.ugm.ac.id/v3/IJCPA/article/view/639.