Dionysopoulou, Anna, Christine Skala, Christel Weiss, Annette Hasenburg, and Stefan Albrich. “Establishment of a New Reference Line for 2D Transperineal Ultrasound in Urogynecology”. Clinical Journal of Obstetrics and Gynecology 3, no. 2 (September 8, 2020): 114–119. Accessed December 3, 2025. https://www.obstetricgynecoljournal.com/index.php/cjog/article/view/cjog-aid1061.