1. Unni KK, Inwards CY, Bridge JA, Kindblom LG, Wold LE. Tumors of the bones and joints. AFIP Atlas of tumor pathology, Series 4. Washington DC: Armed Forces Institute of Pathology; 2005. pp. 126–35.
2. Vensi E. Multiple benign osteoblastoma of the femur and frontal sinus. Ann Laringol Otol Rinol Faringol 1965;64:768–77.
3. Korytowski J, Dulczynski B, Przybora L. Case of frontal sinus osteoblastoma. Otolaryngol Pol 1974;28:575–9.
4. Szlezak L, Przybora L, Markowska M. Benign osteoblastoma of the ethmoid labyrinth, frontal sinus, and orbit. Klin Oczna 1975;45:247–51.
5. Garstecka A, Mackiewicz-Nartowicz H, Szukalski J. Benign osteoblastoma of the frontal sinus. Otolaryngol Pol 2004;58:649–52.