Bednarova, Lubica, Romana Dobáková, Marián Lázár, Natália Jasminská, Tomáš Brestovič, and Ľubomíra Kmeťová. “The Assessment of the Environmental Impact of Selected Plastics”. International Journal for Innovation Education and Research 8, no. 11 (November 1, 2020): 420–425. Accessed January 16, 2021. https://ijier.net/ijier/article/view/2730.