Mat Zin Boestami, Rusyidah, et al. “Production of Kombucha SCOBY Cellulose by Using Tea and Pumpkin Peel Waste As Fermentation Substrates: A Comparison Study”. Journal of Science and Mathematics Letters, vol. 12, no. 2, July 2024, pp. 119-33, https://doi.org/10.37134/jsml.vol12.2.9.2024.