Prokisch, J., B. Babka, P. Eszenyi, A. Sztrik, and T. Takács. “Utilization and Examination of Red, Elemental Selenium Nano Spheres, Produced by Fermentation Technology, in Animal Tests”. Acta Agraria Debreceniensis, no. 49, Nov. 2012, pp. 245-7, doi:10.34101/actaagrar/49/2535.