Nhu Trong, Pham, 		Thi Minh Anh, Nguyen, AND 		Thi Ha, Nguyen.
" Research on the Production Procedure of Escherichia coli  and Salmonella Reference Material on Pork Matrix Using  for Proficiency Testing" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 41 Number 2S (15 November 2025)