00592naa#a2200181#i#450# EN\\bibl\3289 20241001222754.2 2073-0462 20141010b2014####ek#y0engy0150####ca RUS RU Impact of various doses and compounds of selenium on efficiency and its concentration in blood and bodies of bull-calves on sagination Journal article Kazan Kazan state agrarian University 2014 3 с. Journal article local Bikchantaev Irek Sharafutdinov Gazimzyan zh-szf.ru