1. Translaryngeal Tracheostomy: Experience of 340 Cases
2. Ideler IL. Physici et medici Graeci minores: Pseli carmen de re medica, vol. 1. Amsterdam: Hakkert, 1963: 242.
3. Bradley PJ. The obstructed airway. In: Kerr AG, Groves J, eds. Scott-Brown's Otolaryngology, vol. 4, 5th edn. London: Butterworths, 1987: 155–68.