C. A. da Silva, E. H. Hoshi, G. D. Pacheco, and M. V. Briganó, “The probiotics (Pediococcus acidilactici and Bacillus subtilis) evaluation after weaning and effects on the piglets performance”, Semina: Ciênc. Agrár., vol. 27, no. 1, pp. 133–140, Jun. 2006.