KUMAR, R.; DANDA, T. K.; TANDON, A. A Randomized Comparative Study of 0.1% Levobupivacaine with Fentanyl Vs 0.1% Ropivacaine with Fentanyl in patients of Labor Analgesia. Academia Anesthesiologica International, v. 5, n. 2, p. 205-208, 30 Dec. 2020.