Smith, J. C., K. R. Zalewski, R. W. Motl, M. Van Hart, and J. Malzahn. “The Contributions of Self-Efficacy, Trait Anxiety, and Fear of Falling to Physical Activity Behavior Among Residents of Continuing Care Retirement Communities”. Ageing Research, vol. 1, no. 1, Aug. 2010, p. e4, doi:10.4081/ar.2010.e4.