Széles, Éva, Árpád Tóth, A. Nagy, J. Prokisch, B. Kovács, and Z. Győri. “The Importance of Selenium in the Living World and in the Scientific Research”. Acta Agraria Debreceniensis, no. 26, July 2007, pp. 278-86, doi:10.34101/actaagrar/26/3087.