Sobstyl, A., Z. Chilimoniuk, A. Chałupnik, M. Łakota-Sipa, M. Dobosz, A. Borkowska, and M. Sobstyl. “Health Benefits of Hormonal Contraception Used by Symptoms Associated With Acne Vulgaris and Hirsutism”. Journal of Education, Health and Sport, vol. 9, no. 9, Sept. 2019, pp. 457-65, https://apcz.umk.pl/JEHS/article/view/7426.