1. Ellis GL, Auclair PL, Gnepp DR (1991) Surgical pathology of the salivary glands. WB Saunders, Philadelphia, pp 480–482
2. Ellis GL, Auclair PL (1996) Tumors of the salivary glands, 3rd edn. Armed Forces Institute of Pathology, Washington DC, pp 349–352
3. Ellis GL, Auclair PL (2008) Tumors of the salivary glands, 4th edn. American Registry of Pathology and Armed Forces Institute of Pathology, Washington DC, pp 383–386
4. Ghannoum JE, Freedman PD (2004) Signet-ring cell (mucin-producing) adenocarcinomas of minor salivary glands. Am J Surg Pathol 28:89–93
5. Seifert G (1991) Histological typing of salivary gland tumours, 2nd edn. Springer, Berlin, p 27