Ahmed, Manal Mohamed Elsayed. “Polymyxins: ‘Last Resort’ for MDR and/Or XDR Gram-Negative Infections”. Journal of Scientific Research in Medical and Biological Sciences 2, no. 3 (August 12, 2021): 123-141. Accessed May 4, 2026. https://bcsdjournals.com/index.php/jsrmbs/article/view/242.