Arif, Ambreen, Ihsan Ullah, Ronaq Zaman, and Arif Mehmood Khan. “Phenotypic Identification of Different β-Lactamases in Intrinsic and Acquired Colistin Resistant Uropathogenic Gram Negative Bacteria”. Pakistan Journal of Medical Sciences 40, no. 6 (May 21, 2024). Accessed June 27, 2024. https://pjms.org.pk/index.php/pjms/article/view/8516.