Marková, I. “The 20th Anniversary of Journal Acta Universitatis Matthiae Beli Series of Environmental Management”. Annales Universitatis Paedagogicae Cracoviensis Studia Naturae, vol. 3, no. 1, Dec. 2018, pp. 162–164, https://aupcstudianaturae.uken.krakow.pl/article/view/5464.