ABHIJIT PODDAR, et al. “Response Surface Methodological Optimization Of Production Condition Of Hyperthermostable Β Amylase From Bacillus Subtilis DJ5 Under Solid State Fermentation Using Barley As Substrate”. International Journal of Pharma and Bio Sciences, vol. 3, no. 2, June 2012, pp. 9-19, https://ijpbs.net/index.php/journal/article/view/1357.