1. Andrew A., Kramer B.: An experimental investigation into the possible origin of pancreatic islet cells from rhombencephalic neuroectoderm - J. Embryol. exp. Morph.52, 23, 1979.
2. Ayer-le Liévre Ch., Fontaine-Perus J.: The neural crest: its relations with APUD and paraneuron concepts - Arch. histol. jap.5, 409, 1982.
3. Böck P., Gorgas K.: Enterochromaffin cells and enterochromaffin-like cells in the cat pancreas. In:Fujita T. (Ed.): Endocrine gut and pancreas. Elsevier Sci. Publ. Co., Amsterdam, 1976; p. 13.
4. Dorn A., Bernstein H. -G., Hahn H. -J., Kostmann G., Ziegler M.: Immunohistochemical demonstration of somatostatin-, glucagon- and insulin-like immunoreactivities in the central nervous system of rats, sand rats and genetically diabetic mice (C57 BlKsJ/C57BlKsJ db/db). Verh. anat. Ges. (Jena)75, 791, 1981.
5. Dorn A., Koch G.: Zur Enzymhistochemie des Pancreas der Sandratten (Psammomys obesus) nach kalorisch differenter Ernährung - Acta histochem. (Jena)57, 212, 1976.