ŚRODA, Stefania. Socio-demographic problems in Berlin in the years 1990-2002. Bulletin of Geography. Socio-economic Series, [S. l.], n. 2, p. 123–129, 2003. DOI: 10.1515/2530. Disponível em: https://apcz.umk.pl/BGSS/article/view/2530. Acesso em: 13 dec. 2025.