F. Xu, H. Y. Ru, L. X. Sun, Y. J. Zou, C. L. Jiao, T. Y. Wang, J. M. Zhang, Q. Zheng and H. Y. Zhou. A novel sensor based on electrochemical polymerization of diglycolic acid for determina- tion of acetaminophen. Biosensors and Bioelectronics, 2012, 38 (1): 27-30.