1) Wiltshaw E: The natural history of extramedullary plasmacytoma and its relation to solitary myeloma of bone and myelomatosis. Medicine 55: 217-238, 1976
2) Mooris W T, Pead J L: Myeloma of the oesophagus. J clin Path 25: 537-538, 1972
3) Ahmed N, Ramos S, Sika J, et al: Primary extramedullary oesophageal plasmacytoma. Cancer 38: 943-947, 1976