Dynnik, V.O., O.O. Dynnik, and A.Y. Druzhynina. “Vitamin D Level and Hormonal Status Association in Adolescent Girls With Oligomenorrhea”. REPRODUCTIVE ENDOCRINOLOGY, no. 62 (December 29, 2021): 59–62. Accessed April 19, 2024. https://reproduct-endo.com/article/view/249868.