Anastassiadis, S., and H.-J. Rehm. “Continuous Gluconic Acid Production by Aureobasidium Pullulans With and Without Biomass Retention”. Electronic Journal of Biotechnology, vol. 9, no. 5, Oct. 2006, pp. 0-0, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v9n5-18.