1. BERTLER, A, DOPAMINE AND CHROMAFFIN CELLS, ACTA PHYSIOLOGICA SCANDINAVICA 47: 251 (1959).
2. CEGRELL, L, ACTA PHYSIOLOGICA SCANDINAVICA 73 314: 25 (1968).
3. ERANKO, O, JOURNAL OF THE ROYAL MICROSCOPICAL SOCIETY 87: 259 (1967).
4. ACTA PHYSIOLOGICA SCANDINAVICA 1962 56
5. FALCK, B, EVIDENCE FOR PRESENCE OF BIOGENIC AMINES IN PANCREATIC ISLETS, EXPERIENTIA 19: 139 (1963).