1. Bockman DE, Cooper MD, Early lymphoepithelial relationships in human appendix. A combined light and electron microscopic study. Gastreanterology 68: 1160, 1975.
2. Bridges RA, Condie RM, Zak SJ, Good RA, The morphologic basis of antibody formation development during the neonatal period. J Lab Clin Med 53: 331, 1959
3. Cornes JS, Number size and distribution of Peyer's pathches in the human small intestine. 1. The development of Peyer's patches. Gut 6: 225, 1965.
4. Eberl-Rothe G, Langegger PA, Über die Entwicklung der Peyerschen Platten. Z Anat Entwicklungsgeschichte 117:26, 1953
5. Iwase T, Moro I, Mestecky J, Immunohistochemical study of the ontogeny of the secretory immune system. In: McGhee JR, Mestecky J, Ogra PL, Bienenstock J (eds) Recent advances in mucosal immunology. Advances in experimental medicine and biology. Plenum, New York, p 1359, 1987