Ye, X., Y. Zhao, X. Wu, Y. Su, Y. Wu, and F. She. “Identification of Residues Involved in Nucleotidyltransferase Activity of JHP933 from Helicobacter Pyloriby Site-Directed Mutagenesis”. Archives of Biological Sciences, vol. 68, no. 2, June 2016, pp. 439-44, https://serbiosoc.org.rs/arch/index.php/abs/article/view/786.