Bayu, Timor Krisna, Sudadi, and Calcarina Fitriani Retno Wisudarti. “Predictive Factors of Difficult Spinal Anesthesia”. Jurnal Komplikasi Anestesi 12, no. 2 (December 8, 2025): 47-56. Accessed January 18, 2026. https://jurnal.ugm.ac.id/v3/jka/article/view/pdf.