Bibliography

Information:
- http://yoga.about.com/od/yogaposes/a/sideplank.htm
- https://www.yoga.com/ydc/enlighten/enlighten_document.asp?ID=347&section=9&cat=125
- http://www.herbalcureindia.com/yoga-journal/vasisthasana.html

Pictures:
- http://www.yogamary.com.au/