Haider Jawad Kadhim, and Sanaa Burhan Aldeen. “Optimum Conditions of Protease Production from Bacillus Licheniformis (B1) and Its Applications ”. Journal of Madenat Alelem University College, Vol. 6, no. 1, June 2014, pp. 26-39, https://journal.mauc.edu.iq/index.php/JMAUC/article/view/186.