Kejna, M., Araźny, A., Maszewski, R., Przybylak, R., Uscka-Kowalkowska, J., & Vizi, Z. (2009). DAILY MINIMUM AND MAXIMUM AIR TEMPERATURE IN POLAND IN THE YEARS 1951–2005. Bulletin of Geography. Physical Geography Series, (2), 35–56. https://doi.org/10.2478/2320