Hang Thi Thu Dinh, Mai Ngoc Nguyen, and Su Xuan Hoang. 2022. “In-vitro Synthesis of RNA Fragments Specifying Envelope Protein Gene and RdRp Gene of SARS-CoV-2 As Positive Standards for Molecular Diagnosis Tests”. Vietnam Journal of Science, Technology and Engineering 64 (4):60-63. https://doi.org/10.31276/VJSTE.64(4).60-63.