1. Causey, A.L. Talton, D. S. Miller, R.C. and Warren,E.T. (1997): Aspirated safety pin requiring thoracotomy : report of a case and review. Paediatric Emergency Care, 13 : 397–400.
2. Evans, J. N. G. (1987) : Scott-Brown’s Otolaryngology, vol. 6, 5th ed., Butterworth & Co. (Publishers) Ltd., 438–448.
3. Goel, H.C. Yadav, S. PS. Kohili, G.S. and Singh, J. (1989): Oesophageal foreign bodies. Otolaryngology, 18: 49–52.
4. Irvine, G.S. (1960): A case of foreign body in the nasopharynx. The Journal of Laryngology and Otology, 74 : 188–191.
5. Jackson, C. and Jackson, C.L. (1945) : Diseases of Nose, Throat and Ear, 1st. Ed. W.B. Sounders Co. Philadelphia and London, Quoted by Shrestha et al (1996).