Perzyński J, Michalak M, Perzyńska-Starkiewicz A. Psychotic depression or schizophrenia?. Curr Probl Psychiatry [Internet]. 2012 Dec. 15 [cited 2025 Oct. 22];13(3):157-9. Available from: https://czasopisma.umlub.pl/cpp/article/view/2381