F. Xiao-Jun, D. Bi-Sheng, S. Cheng-Bai, Z. Zheng, W. Lin, and D. Hua-Ze, “Synthesis and Antibacterial Activity of a Series of Heterocyclic Sulfonate Ligands and Their Metal Complexes”, ajc, vol. 25, no. 4, pp. 2035–2037, Nov. 2012.