Chu, P. T. B., Phan, H. T. T., Nguyen, H. D. and Phan, T. T. P. (2021) “Development of inducer-free expression plasmids using IPTG-inducible Pspac promoter for Bacillus subtilis”, Vietnam Journal of Science, Technology and Engineering, 63(1), pp. 64-70. doi: 10.31276/VJSTE.63(1).64-70.