1. Light on yoga;Iyengar,1966
2. The yoga tradition;Feuerstein,1998
3. 2016 yoga in America study;Yoga Journal,2016
4. Prevalence, patterns, and predictors of yoga use: results of a U.S. nationally representative survey;Cramer;Am J Prev Med,2016
5. Insight from injury. If the practice of hatha yoga was meant to heal, why are so many yogis getting hurt?;Krucoff;Yoga J,2003