H. Baby Rani and Snigdha Reddy Patlolla 2021. Comparative Study of E?cacy of 0.5% Ropivacaine and 0.25% Levobupivacaine When Used in Tranversus Abdominus Plane Block for Post-Operative Analgesia in Lower Abdominal Surgeries. Academia Anesthesiologica International. 6, 1 (Jun. 2021), 69-75.