9Boyd R D, Kensinger R S, HarrellR J, et ol. Nutrient uptake and endocrine regulation of milk synthesis by mammary tissue of lactating sows[J]. J AnimSci, 1995, 73(Suppl. 2):36-56.
10Harrell R J, ThomasM J, BoydR D. Limitations of sow milk yield on baby pig growth[R]. In: Proe Cornell NutrConf, Ithaca, N. Y., 1993.