Apsari, Ratih Kumala Fajar, and Yusmein Uyun. “Penggunaan Ultrasound Di Anestesi Obstetri”. Jurnal Komplikasi Anestesi 5, no. 3 (August 1, 2018): 63–73. Accessed September 4, 2026. https://journal.ugm.ac.id/v3/jka/article/view/7342.