Tirta, I. . (2024) “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 : JURNAL KESEHATAN MASYARAKAT, 8(1), pp. 2559–2569. doi: 10.31004/prepotif.v8i1.27255.