1. Feng Qibiao. Chemical Engineering Encyclopedia[M]. Chemical Industry Press, Beijing, China, 1991. 466–475 (in Chinese).
2. Wang Zhongyuan, Zhang Yanxi. Benzoic acid produced by liquid air oxidized from toluene[J]. Petroleum Chemical Engineering of Heilongjiang, 1996(1): 1–3 (in Chinese).
3. Wu Xigan, Mo Dao. Statement of high purity benzoic acid refined process[J]. Chemical Engineering of Hunan, 2000, 30(1): 1–3 (in Chinese).
4. Sieber R, Butikofer U, Bosset J O. Benzoic acid as a natural compound in cultured dairy products and cheese[J]. International Dairy Journal, 1995, 5: 227–246.
5. Lin Guanting. Notebook of Food Additives[M]. 3rd edition. Chemical Industry Press, Beijing, China, 2003. 645 (in Chinese).