CHAN, V. Y., LAU, W.-L., LO, T.-K. and LEUNG, W.-C. (2015) “Comparison of Digital Vaginal Examination with Intrapartum Transabdominal Ultrasound to Determine Fetal Head Position: a Local Experience”, Hong Kong Journal of Gynaecology, Obstetrics and Midwifery, 15(1). doi: 10.12809/hkjgom.15.1.172.