Shah, V. A., and M. Bajaj. “Ultrasound Guided Abdominal Field Blocks Improve Postoperative Pain Relief in Cesarean Delivery: A Prospective Randomized Controlled Study”. Anaesthesia, Pain & Intensive Care, Jan. 2019, pp. 218-23, https://apicareonline.com/index.php/APIC/article/view/115.