Hermansyah, Hermansyah, et al. “Colony Morphology of Yeast Isolates from Tuak and Its Application in Producing Ethanol From Sugarcane Bagasse”. Sriwijaya Journal of Environment, vol. 1, no. 3, Dec. 2016, pp. 64-67, https://ojs.pps.unsri.ac.id/index.php/ppsunsri/article/view/27.