McCubbin, J., Wilson, J., Bruehl, S., Ibarra, P., Carlson, C., Norton, J., & Colclough, G. (1996). Relaxation training and opioid inhibition of blood pressure response to stress. Journal of Consulting and Clinical Psychology, 64(3), 593-601. https://doi.org/10.1037//0022-006x.64.3.593

Bruehl, S., Carlson, C., Wilson, J., Norton, J., Colclough, G., Brady, M., … McCubbin, J. (1996). Psychological coping with acute pain: an examination of the role of endogenous opioid mechanisms. Journal of Behavioral Medicine, 19(2), 129-42. https://doi.org/10.1007/BF01857603

Bruehl, S., McCubbin, J., Carlson, C., Wilson, J., Norton, J., Colclough, G., … Sherman, J. The psychobiology of hostility: possible endogenous opioid mechanisms. International Journal of Behavioral Medicine, 3(2), 163-76. https://doi.org/10.1207/s15327558ijbm0302_5 (Original work published 1996)

Ibarra, P., Bruehl, S., McCubbin, J., Carlson, C., Wilson, J., Norton, J., & Montgomery, T. (1994). An unusual reaction to opioid blockade with naltrexone in a case of post-traumatic stress disorder. Journal of Traumatic Stress, 7(2), 303-9. https://doi.org/10.1007/BF02102950