References

http://www.yogajournal.com/poses/481
http://yoga.lovetoknow.com/Supported_Headstand
http://www.youtube.com/watch?v=v2W3DHLBBI0
http://thumb15.shutterstock.com.edgesuite.net/display_pic_with_logo/64260/64260,1188517638,1/stock-photo-sporty-girl-practicing-salamba-sirsasana-supported-headstand-4973908.jpg
http://thumb1.shutterstock.com.edgesuite.net/display_pic_with_logo/64260/64260,1182248707,2/stock-photo-sporty-girl-practicing-salamba-sirsasana-supported-headstand-3556748.jpg
http://thumb18.shutterstock.com.edgesuite.net/display_pic_with_logo/64260/64260,1204185248,1/stock-photo-sporty-girl-practicing-salamba-sirsasana-supported-headstand-on-white-sand-9852205.jpg
http://thumb15.shutterstock.com.edgesuite.net/display_pic_with_logo/64260/64260,1222607985,1/stock-photo-sporty-girl-practicing-salamba-sirsasana-supported-headstand-18054208.jpg
http://us.123rf.com/400wm/400/400/dolgachov/dolgachov0802/dolgachov080200095/2592911.jpg