Siddiqui, A. S., B. Salim, and S. Z. Siddiqui. “Comparison of Phenylephrine and Ephedrine for Treating Hypotension After Spinal Anesthesia for Cesarean Section: A Randomized Double-Blind Clinical Trial”. Anaesthesia, Pain & Intensive Care, Jan. 2019, pp. 44-49, https://www.apicareonline.com/index.php/APIC/article/view/328.