Urbanovych, A., H. Suslyk, O. Lishchuk, and K. Kozlovska. “The Role of Vitamin D in Treatment of Polycystic Ovary Syndrome Depending on Phenotype”. Romanian Journal of Diabetes Nutrition and Metabolic Diseases, Vol. 27, no. 3, Sept. 2020, pp. 237-44, http://www.rjdnmd.org/index.php/RJDNMD/article/view/766.