I looked through my growing files of references and think these are ones that
several people have been asking for:
1. for the question asking about human milk killing cancer cells. Hakansson
A, et al. Apoptosis induced by a human milk protein. Proc Natl Acad Sci 1995;
92:8064-8068
2. for the question regarding the immune status of formula-fed babies and the
antibody response of infants fed human milk vs milk-based or soy-based
formulas:

Zoppi G. Diet and antibody response to vaccinations in healthy infants.
Lancet 1983; July 2:11-14

Hahn-Zoric M, et al. Antibody responses to parenteral and oral vaccines are
impaired by conventional and low protein formulas as compared to
breastfeeding. Acta Paediatr Scand 1990; 79:1137-1142

Zoppi G, et al. Immunocompetence and dietary protein intake in early infancy.
J Pediatr Gastroenterol Nutr 1982; 1:175-182

Hope this is helpful