1. AderHJ MellenberghGJ with contributions by HandDJ.2008. Methodological quality Chapter 3. In: Advising on Research Methods: A Consultant's Companion.Huisen The Netherlands: Johannes van Kessel Publishing.
2. BergmanRA ThompsonSA AfifiAK SaadehFA.1988. Compendium of Human Anatomic Variations. Baltimore‐Munich: Urban & Schwarzenberg.
3. BergmanRA AfifiAK MiyauchiR.2002. Illustrated encyclopaedia of human anatomic variations. URL:http://www.uh.org/Providers/Texbooks/AnatomicVariants/AnatomyHP.html. Accessed in November 2013.
4. Anatomic variations of the median nerve in carpal tunnel release
5. Variations in the formation of the median nerve and its clinical correlation;Budhiraja V;Folia Morphol (Warsz),2012