1) Dubin IN, Johnson FB: Chronic idiopathic jaundice with unidentified pigment in liver cells. A new clinicopathological entity with a report of 12 cases. Medicine 33: 155-197, 1954
2) Spring H, Nelson RS: Persistent nonhemolytic hyperbilirubinemia associated with lipochrome-like pigment in liver cells, report of four cases. Ann Int Med 41: 952-962, 1954