Grešáková, Ľubomíra, Čobanová, K., Faix, Å tefan and Venglovská, K. 2013. SELENIUM BALANCE IN LAYER CHICKENS FED DIETS SUPPLEMENTED WITH SELENIUM FROM INORGANIC OR ORGANIC SOURCES. Journal of microbiology, biotechnology and food sciences. 2, Abstracts special issue (Jun. 2013), 3.