^Brannon, RB; Sciubba, JJ; Giulani, M (July 2001). "Ductal papillomas of salivary gland origin: A report of 19 cases and a review of the literature". Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology. 92 (1): 68–77. doi:10.1067/moe.2001.115978. PMID11458248.