Urinary selenium excretion in selenite-loaded sheep and subsequent Se dynamics in blood constituents Klaudia Boldi Árová, L'ubomíra Grešáková, Štefan Faix, Mikuláš Levkut and L'ubomír Leng Reprod. Nutr. Dev., 43 4 (2003) 385-393 DOI: 10.1051/rnd:2003025