Ahmad, M., A. Furqan, M. Adnan, S. Waris, and M. Yousuf. “Transversus Abdominis Plane Block Offers Prolonged Postoperative Analgesia Than Surgical Incision Infiltration by Bupivacaine in Cesarean Section Patients”. Anaesthesia, Pain & Intensive Care, Jan. 2019, pp. 312-6, https://apicareonline.com/index.php/APIC/article/view/131.