K. A. Kernacki, J. A. Hobden, L. D. Hazlett, R. Fridman and R. S. Berk, “In Vivo Bacterial Protease Production during Pseudomonas aeruginosa Corneal Infection,” Investigative Ophthalmology & Visual Science, Vol. 36, No. 7, 1995, pp. 1371-1378.
 C. Van Delden, E. C. Pesci, J. P. Pearson and B. H. Iglewski, “Starvation Selection Restores Elastase and Rhamnolipid Production in a Pseudomonas aeruginosa Quorum-Sensing Mutant,” Infection and Immunity, Vol. 66, No. 9, 1998, pp. 4478-4502.
 K. Sakata, H. Yajima, K. Tanka, Y. Sakamoto, K. Yamamoto, A. Yoshida and Y. Dohi, “Erythromycin Inhibits the Production of Elastase by Pseudomonas aeruginosa with Affecting Its Proliferation in Vitro,” The American Review of Respiratory Disease, Vol. 148, No. 1, 1993, pp. 1061-1065. doi:10.1164/ajrccm/148.4_Pt_1.1061
 J. L. Kadurugamuwa and T. J. Beveridge, “Virulence Factors Released from P. aeruginosa in Associated with Member Vesicles during Normal Growth and Exposure Gentamicin Novel Mechanism of Enzyme Secretion,” Journal of Bacteriology, Vol. 177, No. 14, 1995, pp. 3998-4008.
 K. Kalaiarasi and P. U. Sunitha, “Optimization of Alkaline Protease Production from Pseudomonas fluorescens Isolated from Meat Waste Contaminated Soil,” African Journal of Biotechnology, Vol. 8, No. 24, 2009, pp. 7035-7041.
 R. Gupta, Q. K. Beg and P. Lorenz, “Bacterial Alkaline Proteases: Molecular Approaches and Industrial Application,” Applied Microbiology and Biotechnology, Vol. 59, No. 1, 2002, pp. 15-32. doi:10.1007/s00253-002-0975-y
 D. Agarwal, P. Patidar, T. Banerjee and S. Patil, “Production of Alkaline Protease by Penicillium sp. Under SSF Conditions and Its Application to Soy Protein Hydrolysis,” Process Biochemistry, Vol. 39, No. 8, 2004, pp. 977-981. doi:10.1016/S0032-9592(03)00212-7
 M. A. Al-Shhri and S. Y. Mostafa, “Production and Some Properties of Protease Produced by Bacillus Licheniformis Isolated from Tihamet Aseer, Saudi Arabia,” International Journal of Biological Sciences, Vol. 7, No. 9, 2004, pp. 1631-1635.
 A. J. Saleem, “Biochemical Study of Alkaline Protease Produced from Pseudomonas aeruginosa Isolated from Patients,” M. Sc. Thesis, College of Education for Pure Science, University of Diyala, Baquba, 2007.
 Ikram-ul-Haq, H. Mukhtar, Z. Ali and N. Riaz, “Protease Biosynthesis by Mutant Strain of Penicillium griseoroseum and Cheese Formation,” International Journal of Biological Sciences, Vol. 7, No. 9, 2004, pp. 1473-1476.
 A. L. Cheung, K. J. Eberhardt, E. Chung, et al., “Diminished Virulence of sar-/agr-mutant of Staphylococcus aureus in the Rabbit Model of Endocarditis,” Journal of Clinical Investigation, Vol. 94, No. 5, 1994, pp. 1815-1822. doi:10.1172/JCI117530
 M. J. Horsburgh, J. L. Aish and I. J. White, “Sigma B Modulates Virulence Determinant Expression and Stress Resistance: Characterization of a Functional rsb V Strain Derived from Staphylococcus aureus 8325-4,” Journal of Bacteriology, Vol. 184, No. 19, 2002, pp. 5457-5467. doi:10.1128/JB.184.19.5457-5467.2002
 M. J. Gambello, S. Kaye and B. H. Laglewski, “Las R of P. aeruginosa Is a Transcriptional Activators of the Alkaline Protease Gene (apr) and an Enhancer of Exotoxin-A Expression,” Infection and Immunity, Vol. 61, No. 4, 1993, pp. 1180-1184.