Wijayanti, Dinda Kartika, et al. “Inhibition of α-Glucosidase Enzyme by Ethanol Extract of Kratom Leaf Variant (Mitragyna Speciosa Korth.)”. Hydrogen: Jurnal Kependidikan Kimia, vol. 11, no. 3, June 2023, pp. 286-95, doi:10.33394/hjkk.v11i3.7776.