Tohma, Y.A., Altay, M.M., Turgut, D., Coşkun, S., Ünlübilgin, E., Esin, S., Gelişen, O. and Erol, O. 2014. Second Trimester Umbilical Cord Coiling Index and Perinatal Outcomes. Gynecology Obstetrics & Reproductive Medicine. 20, 3 (Dec. 2014), 135–142.