Xuan Thach, T., Thu Trang, L., Phi Long, T., Hoa, N.T., Quyen, D.V. and Minh Huong, N. 2020. Polymorphism at variable regions (VRs) of porA gene from Neisseria meningitidis strains isolated in Northern Vietnam. Vietnam Journal of Biotechnology. 18, 1 (Jul. 2020), 167–175. DOI:https://doi.org/10.15625/1811-4989/18/1/15275.