Hechun Zhang, Haizhen Wu, Huizhan Zhang, and Yuanxing Zhang. “A NOVEL POINT MUTATION IN RpsL GENE OF STREPTOMYCES COELICOLOR WITH ENHANCED BLUE PIGMENT PRODUCTION”. Pakistan Journal of Biotechnology, vol. 3, no. (1-2), July 2006, pp. 93-97, https://pjbt.org/index.php/pjbt/article/view/183.