VOLCHAK, Aleksander, CHOIŃSKI, Adam, KIRVIEL, Ivan and PARFOMUK, Siergiej. Spectral analysis of water level fluctuations in Belarusian and Polish lakes. Bulletin of Geography. Physical Geography Series. Online. 31 May 2017. No. 12, pp. 51-58. [Accessed 23 July 2024]. DOI 10.1515/bgeo-2017-0005.