Zeng, Hua-Wei, Yu-Jie Cai, Xiang-Ru Liao, Feng Zhang, Yu-Lin Li, and Da-Bing Zhang. 2010. “Citric Acid Induction and Statistical Optimization for Production Enhancement of Catalase by Serratia Marcescens SYBC08”. Asian Journal of Chemistry 23 (4):1488-92. https://asianpubs.org/index.php/ajchem/article/view/10215.