MITRA, S.; BHANDARI, G.; CHAUHAN, R. Comparative Evaluation of Newer Local Anesthetics (Levobupivacaine and Ropivacaine) With Bupivacaine, in Lumbar Epidural Anesthesia for Hip Surgeries: A Randomized Controlled Trial. Academia Anesthesiologica International, v. 1, n. 1, p. 28-32, 15 Jun. 2016.