1. Microbial processes for ascorbic acid biosynthesis: a review;Boudrant;Enzym. Microb. Technol.,1990
2. Biotechnological approaches for L-ascorbic acid production;Hancock;Trends Biotechnol.,2002
3. Recovery of carboxylic acids produced by fermentation;López-Garzón;Biotechnol. Adv.,2014
4. R. Dümpelmann, T. Keglevic, Process for the Conversion of the Sodium Salt of 2-Keto-L-Gulonic Acid to the Free Acid, US 5852211 A.
5. J. De Troostembergh, I. Debonne, W. Obyn, C. Peuzet, Process for the Manufacture of 2-Keto-L-Gulonic Acid, EP 1417324 A2.