1. Allen, W.D. and Porter, P., 1973. The relative distribution of IgM and IgA cells in intestinal mucosa and lymphoid tissues of the young unweaned pig and their significance in ontogenesis of secretory immunity. Immunol., 24: 493–501.
2. Arsov, R., Rashkov, D., Vodas, K., Georgieva, D. and Bekyarova, N., 1977. Studies on the resorption of colostral globulins and the release of antibodies againstBacterium rhusiopathiae suis, Salmonella choleraesuis and beta-haemolyticEscherichia coli in newborn pigs. Vet. Sci. Sophia, 14: 26–32.
3. Berek, G., 1978. Comparative examination on rearing for piglets of low birth weight by freeze stored sow's and cow's colostrum. Állattenyésztés, 27: 263–271.
4. Bourne, F.J. and Curtis, J., 1973. Half-lives of immunoglobulins IgG, IgA and IgM in the serum of newborn pigs. Immunol., 24: 157–162.
5. Brandenburg, A.C. and Wilson, M.R., 1973. Immunity toEscherichia coli in pigs: IgG immunoglobulin in passive immunity toE. coli enteritis. Immunol., 24: 119–127.