Nagórska, Małgorzata, Aneta Sowa, Katarzyna Wardak, and Małgorzata Lesińska-Sawicka. 2018. “Symptoms of Menopause and Health of Women During Perimenopause”. European Journal of Clinical and Experimental Medicine 16 (4):259–266. https://doi.org/10.15584/ejcem.2018.4.2.