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2. Ashtanga Yoga: Practice and Philosophy;Maehle,2006
3. Yoga Sutras of Patanjali;Stiles,2002
4. Complementary and alternative medicine use among adults and children: United States, 2007;Barnes;Natl Health Stat Rep,2008
5. Yoga in the real world: motivations and patterns of use;Quilty;Explore (NY),2009