Weryszko-Chmielewska , E., and K. Piotrowska-Weryszko. “Characteristics of Pollen Seasons of Selected Allergenic Plants in Lublin in 2012”. Alergoprofil, Vol. 9, no. 1, Apr. 2013, pp. 22-25, https://www.journalsmededu.pl/index.php/alergoprofil/article/view/754.