2Sharma PK, Songra AK, Ng SY. Intraoperative ultrasound-guided retrieval of an airgun pellet from the tongue: a case report. Br J Oral Maxillofac Surg, 2002,40(2 ) : 153-155.
3Eggers G, Mukhamadiev D, Hassfeld S. Detection of foreign bodies of the head with digital volume tomography. Dentomaxillofac Radio1, 2005.34(2):74-79.