1. Ward, N. Cited by Hyams.7
2. Billroth, T., cited by Hyams.7
3. Pathology of Malignant Tumors Arising in Nasal and Paranasal Cavities and Maxilla;Ringertz;Acta Otolaryngol. Suppl.,1938
4. The Inverted Schneiderian Papilloma: A Clinical and Pathological Study;Vrabec;The Laryngoscope,1975
5. True Papilloma of the Nasal Cavity;Kramer;Arch. Otolaryngol.,1935