Zhang, W.-W., M.-M. Yang, H.- xin Li, and D. Wang. “Construction of Recombinant Bacillus Subtilis Strains for Efficient Pimelic Acid Synthesis”. Electronic Journal of Biotechnology, vol. 14, no. 6, Oct. 2011, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/v14n6-1.