But, A.; Ozturk, E.; Gulhas, N.; Durmus, M.; Dogan, Z.; Ersoy, M. The Effects of Intrathecal Bupivacaine-Fentanyl and Bupivacaine-Morphine on Ephedrine Requirements and Health Status of Fetus in Elective Cesarean Section. annalsmedres 2021, 12, 0005-0009.