I. . Tirta, “THE EFFECTIVENESS OF GREATER AURICULAR NERVE (GAN) BLOCK USING ISOBARIC ROPIVACAINE AS AN ANALGESIC ADJUVANT AS COMPARED TO INTRAVENOUS OPIOID AS ANALGESIA FOR MIDDLE EAR SURGERY”, PREPOTIF, vol. 8, no. 1, pp. 2559–2569, Aug. 2024.