Arumugam, Balakrishnan, and Brinda Elangovan. “Role of B. Licheniformis in Bio Mineralization of Calcium Carbonate and Its Biological Applications”. International Research Journal of Multidisciplinary Technovation 1, no. 6 (November 2, 2019): 622-629. Accessed October 23, 2020. https://mapletreejournals.com/index.php/irjmt/article/view/342.