Kejna M, Uscka-Kowalkowska J. Solar radiation variability at Koniczynka near Toruń (Central Poland) in the years 2003–2016. BOGPGS [Internet]. 2018 Dec. 17 [cited 2024 Apr. 20];(15):27-40. Available from: https://apcz.umk.pl/BOGPGS/article/view/15614