PATEL, K.; MODI, K. A Comparative Study of Intrathecal Ropivacaine-Fentanyl versus Levobupivacaine-Fentanyl in Adult Patients Undergoing Planned Inguinal Hernioplasty. Academia Anesthesiologica International, v. 6, n. 1, p. 96-100, 5 Jun. 2021.