Sumitro, A. R., A. Salinding, D. . Susila, and B. . Sutikno. “Analysis of the Effectiveness of Sphenopalatine Ganglion Block on Fentanyl Needs in Endoscopic Endonasal Surgery As Measured by QNOX Score”. Bali Medical Journal, vol. 11, no. 3, Nov. 2022, pp. 1582-6, doi:10.15562/bmj.v11i3.3869.