Park, C. L., Groessl, E., Maiya, M., Sarkin, A., Eisen, S. V., Riley, K., & Elwy, A. R. (2014). Comparison Groups in Yoga Research: A Systematic Review and Critical Evaluation of the Literature. Complement Ther Med.

Park, Crystal L., Erik Groessl, Meghan Maiya, Andrew Sarkin, Susan V. Eisen, Kristen Riley, e A. Rani Elwy. "Comparison Groups in Yoga Research: A Systematic Review and Critical Evaluation of the Literature." Complement Ther Med 2014.

Park, Crystal L., et al. "Comparison Groups in Yoga Research: A Systematic Review and Critical Evaluation of the Literature." Complement Ther Med 2014.