PLEWA, Katarzyna, WRZESIŃSKI, Dariusz and PTAK, Mariusz. Seasonal structure of water stages on lakes in Northern Poland. Bulletin of Geography. Physical Geography Series. Online. 19 December 2018. No. 15, pp. 101-110. [Accessed 23 July 2024]. DOI 10.2478/bgeo-2018-0019.