D. R. . Pratiwi, Y. C. . Sulistyaningsih, and D. . Ratnadewi, “Localization of Alkaloid and Other Secondary Metabolites in Cinchona ledgeriana Moens: Anatomical and Histochemical Studies on Fresh Tissues and Cultured Cells”, HAYATI J Biosci, vol. 27, no. 1, p. 1, Jan. 2020, doi: 10.4308/hjb.27.1.1.