S. . Zupka, A. . Vollmannová, Ľuboš . Harangozo, M. . Slávik, and M. . Medvecký, “Risk of contamination of wild berries from upper Orava region by cadmium”, Potr. S. J. F. Sci., vol. 10, no. 1, pp. 126–131, Jan. 2016.