Rapiejko , Adam, Agnieszka Lipiec, and Ewa Kalinowska. “Characteristics of Pollen Seasons of Hazel, Alder and Birch in Zielona Gora in 2014”. Alergoprofil 10, no. 2 (June 9, 2014): 49-52. Accessed October 3, 2025. https://www.journalsmededu.pl/index.php/alergoprofil/article/view/802.