Shalesh, F.J. et al. 2013. Role of magnesium ions on Improvement of Fermentative activity of local yeast isolates Saccharomyces cerevisiae for ethanol production. Journal of Biotechnology Research Center. 7, 3 (Dec. 2013), 18–26. DOI:https://doi.org/10.24126/jobrc.2013.7.3.275.