Kumar Nigam, V., R. Verma, A. Kumar, S. Kundu, and P. Ghosh. “Influence of Medium Constituents on the Biosynthesis of Cephalosporin-C”. Electronic Journal of Biotechnology, vol. 10, no. 2, Apr. 2007, pp. 0-0, https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v10n2-8.