8Erf GF, Bottjc WG, Bersi TK, et al. Effects of dietary vitamin E on the immune system in broilers:altered proportions of CD4 T ceils in the thymus and splecn[J]. Poultry Science, 1998, 77(4): 529-537.
9Wysocki E, Szczygiel A, Ziemldnski S, et al. Nutrition and dental caries. IX. Effect of diets, corresponding to common consumption of 2 groups of the population, on the occurrence of dental caries in rats [J]. Rocz Panstw Zakl Hig. 1967, 18(2):143-150.
