Majda, K., K. Dudzik, A. Jarząbkowska, and O. Łakomska. “Munchausen Syndrome by Proxy. Causes, Signs and Treatment”. Journal of Education, Health and Sport, vol. 9, no. 9, Sept. 2019, pp. 393-9, https://apcz.umk.pl/JEHS/article/view/7418.