N. Nguyen, T. Phan, T. Tran, and H. Nguyen, “Investigating the expression of GFP fused with HIS-TAG at N- or Cterminus using plasmid pHT253 and pHT254 in Bacillus subtilis”, Science and Technology Development Journal, vol. 17, no. 4, pp. 5-11, Dec. 2014.