Dr. Jishnu.V,Dr Vinod Kumar Yadav,Dr Leena Goel,Dr Anshul Gaur. “A Comparative Study of Local Anaesthetic Agent Levobupivacaine and Ropivacaine in Ultrasound Guided Erector Spinae Plane Block in Patients Undergoing Laparoscopic Cholecystectomy”. International Journal of Pharmacy Research & Technology (IJPRT), vol. 16, no. 2, July 2026, pp. 351-64, https://ijprt.org/index.php/pub/article/view/2298.