Azemin, Azierah, et al. “Pattern Recognition for Varieties of Malaysian Herb, Ficus Deltoidea Jack through Chemometric Applications from GC-MS Fingerprinting”. International Journal of Engineering & Technology, vol. 7, no. 3.14, July 2018, pp. 348-55, https://doi.org/10.14419/ijet.v7i3.14.18817.