Reference

Internet
http://www.peakfreaks.com/sherpa_culture.htm
http://en.wikipedia.org/wiki/Sherpa_people
http://geography.about.com/od/culturalgeography/a/sherpa.htm
http://www.sherpakyidug.org/sherpa/sherpa_questions_answers.asp
http://sherpa-times.wikispaces.com/Sherpa+Clothing
https://www.trekhimalayan.com/index.php?destination=nepal&option=information&infoid=172
http://birdsofnepal.wordpress.com/
http://www.sherpakyidug.org/sherpa/sherpa_facts.asp

Articles
Sherpas: Religion and the Printed Word
By Matthew Kapstein
http://www.culturalsurvival.org/publications/cultural-survival-quarterly/china/sherpas-religion-and-printed-word
Tourism, Persistence, and Change: 
Sherpa Spirituality and Place in Sagarmatha 
(Mount Everest) national Park and Buffer Zone, Nepal
By Jeremy Spoon
http://scholarcommons.usf.edu/cgi/viewcontent.cgi?article=1002&context=jea

Books

High Religion: A Cultural and Political History of Sherpa Buddhism

 By Sherry B. Ortner

Sherpas: Reflections on Change in Himalayan Nepal

 By James F. Fisher

Life and Death on Mt. Everest: Sherpas and Himalayan Mountaineering

 By Sherry B. Ortner