Hasan, S. A.; Aziz, M.; Faruqi, N. A. (September 9, 1985). "Inverted papilloma of the nose (Ringertz tumour)". Journal of the Indian Medical Association. 83 (9): 316–318. PMID 4086856 – via PubMed.
Jeon TY, Kim HJ, Chung SK, Dhong HJ, Kim HY, Yim YJ, Kim ST, Jeon P, Kim KH (May 22, 2008). "Sinonasal Inverted Papilloma: Value of Convoluted Cerebriform Pattern on MR Imaging". American Journal of Neuroradiology. 29 (8): 1556–1560. doi:10.3174/ajnr.A1128. PMID 18499786
