Gil, A. & Sanchez-Medina, F. "Acid soluble nucleotides of cow's, goat's and sheep's milk at different stages of lactation." Journal of Dairy Research, 1981;48:35-44.

Holbrook, N.J. & Ikeyama, S. "Age-related decline in cellular response to oxidative stress: links to growth factor signaling pathways with common defects." Biochem Pharmacol, 2002;64(5-6):999-1005.

Playford, R.J., et al. "Co-administration of the health food supplement, bovine colostrum, reduces the acute nonsteroidal anti-inflammatory drug-induced increase in intestinal permeability." Clin Sci (Lond), 2001;100(6):627-633.

Ullman, et al. "Effects of Growth Hormone on muscle regeneration and IgF-1 concentration in old rats." Acta Physiol Scand, 1990;140:521-525.
Xian, C.J., et al. "Degradation of IGF-1 in the adult rat gastrointestinal tract is limited by a specific antiserum or the dietary protein casein." Journal of Endocrinology, 1995;146:215-225.