1.
SZYMAŃSKA, Daniela and BIEGAŃSKA, Jadwiga. The Eastern and the Western Cuiavia - One Region, Two Development Lines. Bulletin of Geography. Socio-economic Series. Online. 22 December 2008. No. 10, p. 75–84. [Accessed 29 June 2025]. DOI 10.1515/v10089-008-0014-6.