Weryszko-Chmielewska , E., K. Piotrowska-Weryszko, W. Haratym, B. Żuraw, A. Lipiec, R. Gawlik, K. Chłopek, M. Malkiewicz, M. Ziemianin, and E. Maciejewska. “Betula Pollen Season in Southern Poland in 2016”. Alergoprofil, Vol. 12, no. 2, June 2016, pp. 96-100, https://journalsmededu.pl/index.php/alergoprofil/article/view/866.