1. DeLellis RA, Lloyd RV, Heitz PU, Eng C (2004) Tumours of Endocrine Organs. In: Kleihues P, Sobin LH (eds) World Health Organization classification of tumours. IARC Press, Lyon
2. Kohn A (1903) Die Paraganglien. Arch Mikr Anat 52:262–365
3. Stilling H (1898) Die chromophilen Zellen und Korperchen des Sympathicus. Eine Berichtigung. Anat Anz 15:229–233
4. Watzka M (1934) Vom paraganglion caroticum. Anat Anz 78:108–120
5. Addison T (1937) On the constitutional and local effects of disease of the suprarenal capsules. 1855. In a collection of the published writings of the late Thomas Addison MD, physician to Guy's Hospital, London. New Sydenham Society, London, 1868. Med Classics 2:244–293