Puc , M., Kotrych , D., Lipiec , A., Rapiejko , P. and Siergiejko , G. (2016) “Birch pollen grains without cytoplasmic content in the air of Szczecin and Bialystok”, Alergoprofil, 12(2), pp. 101-105. Available at: https://www.journalsmededu.pl/index.php/alergoprofil/article/view/867 (Accessed: 10June2026).