Walkowska, Anita, et al. “The Dynamics of Changes in the Sum and Structure of Atmospheric Precipitation in Wielkopolska in 1981–2020”. Badania Fizjograficzne Seria A - Geografia Fizyczna, vol. 13, no. A 73, Aug. 2023, pp. 207-26, doi:10.14746/bfg.2022.13.12.