5Heugten E V, Dorton K L. Effects of live yeast sup- plementation on weanling Pig Performance. Annual Swine Report, College of agricultures and life sci- ences, North Carolina State University,2001.
7Weedman S M,Rostagno M H, Patterson J A, et al. Yeast culture supplement during nursing and trans- port affects immunity and intestinal microbial ecology of weanling pigs. J. Anim. Sci. , 2011 (89) : 1908 - 1921.
8Mathew A G, Chattin S E, Robbins C M, et al. Effects of a Direct - Fed Yeast Culture on Enteric Microbial Populations, Fermentation Acids, and Performance of Weanling Pigs. J. Anim. Sci. , 1998 (76) :2138 - 2145.