Tài liệu tham khảo
* Foreign Bodies on Lateral Neck Radiographs in Adults: Imaging Findings and Common Pitfalls – Alba Castán Senar , Laura E. Dinu, José M. Artigas, Raquel Larrosa
* Identifying ingested foreign bodies in lateral neck radiograph of adult patients at Asia-Pacific region – V. Krishnan, A. Chawla, K. Chokkappan
* Foreign bodies: What a wonderful world – L. Garcia-Ferrer, R. Garcia Garcia, M. D. MONEDERO