Khairunnisa, Sinta, Harmita H, and Herman Suryadi. “Production of Zinc-Yeast from Saccharomyces Cerevisiae Fermentation and Determination of Zinc Content by Atomic Absorption Spectrophotometry”. International Journal of Pharmaceutical Investigation 11, no. 3 (October 13, 2021): 274-277. Accessed December 9, 2021. https://jpionline.org/index.php/ijpi/article/view/1085.