Татарчук, Т. Ф., А. О. Исламова, and О. А. Ефименко. “Menopausal Syndrome As the First Clinical Manifestation of Perimenopause”. REPRODUCTIVE ENDOCRINOLOGY, no. 21, Feb. 2015, pp. 52-56, doi:10.18370/2309-4117.2015.21.52-56.