Arif, Ambreen, Ihsan Ullah, Ronaq Zaman, and Arif Mehmood Khan. 2024. “Phenotypic Identification of Different β-Lactamases in Intrinsic and Acquired Colistin Resistant Uropathogenic Gram Negative Bacteria”. Pakistan Journal of Medical Sciences 40 (6). https://doi.org/10.12669/pjms.40.6.8516.