Hudák, M., M. Randis, T. Bartaloš, M. Kmeťová, I. Kosová, and M. Horník. “The Preliminary Study of the Selected Environmental Effects Around the Paper Industry”. Oecologia Montana, Vol. 24, no. 2, Dec. 2015, pp. 78-83, https://om.vuvb.uniza.sk/index.php/OM/article/view/275.