1. Commissioning medicines for children in specialised services. (2017). https.//www.england.nhs.uk/publication/commissioning-medicines-for-children-specialised-services/.
2. Umbilical artery resistance index in the surveillance of pregnancies at risk of fetal-maternal hemodynamic disorders in Lomé (Togo). (2018). https.//www.scirp.org/(S(czeh2tfqyw2orz553k1w0r45))/reference/referencespapers.aspx?referenceid=2348725.
3. Tumors of the ovary, maldeveloped gonads, fallopian tube and broad ligament. Atlas of tumor pathology. Third series. (1999). https.//onlinelibrary.wiley.com/doi/abs/10.1002/%28SICI%291096-9896%28199909%29189%3A1%3C145%3A%3AAID-PATH420%3E3.0.C....
4. Relative frequency of ovarian neoplasms in children and adolescents;Henry J. Norris MD,1972
5. WHO classification of soft tissue tumours: an update based on the 2013 (4th) edition;Jo VY;Pathology,2014