Sahoo, S. P., S. C. Jayasingh, S. S. Routray, and B. Mohapatra. “Laparoscopic Cholecystectomy - Comparison of Two Different Techniques of Ultrasound Guided Blocks for Postoperative Pain Relief”. International Journal of Health and Clinical Research, vol. 4, no. 8, Apr. 2021, pp. 96-100, https://ijhcr.com/index.php/ijhcr/article/view/1420.