Huyền, Đỗ T. “EXPRESSION OF HAS GEN CODING FOR HEMAGGLUTININ (HA) ANTIGEN OF INFLUENZA VIRUS A/H5N1 IN ESCHERICHIA COLI”. Vietnam Journal of Biotechnology, vol. 7, no. 2, Nov. 2011, pp. 185-92, doi:10.15625/1811-4989/7/2/12433.