Singh, S., Giri, M. K., Singh, M., & Giri, N. K. (2019). A clinical comparative study of intraperitoneal instillation of ropivacaine alone or ropivacaine with nalbuphine for postoperative analgesia in laparoscopic cholecystectomy. Anaesthesia, Pain & Intensive Care, 335-339. Retrieved from https://apicareonline.com/index.php/APIC/article/view/135