Simpson, T. L., Kaysen, D., Bowen, S., MacPherson, L. M., Chawla, N., Blume, A., ... & Larimer, M. (2007). PTSD symptoms, substance use, and vipassana meditation among incarcerated individuals. Journal of Traumatic Stress: Official Publication of The International Society for Traumatic Stress Studies, 20(3), 239-249.