1. Pheochromocytoma;Burton;American Journal of Nursing,1997
2. Endocrine Web Inc. Laparoscopic Adrenal Surgery; (1997). Feb 12, 2004. www.endocrineweb.com/laparo.html
3. Online Medical Dictionary. Chromaffin Tissue; (2003). Feb 2, 2004. http://cancerweb.ncl.ac.uk/omd/
4. Pheochromocytoma;Winer;Critical Care Nursing Quarterly,1990
5. Echocardiographic Features of Genetic Diseases: Part 5. Tumours;Alizad;Journal of the American Society of Echocardiography,2000