Sells, S. B., Chatham, L. R., & Retka, R. (1972). A study of differential death rates and causes of death among 9276 opiate addicts during 1970-1971. Contemporary Drug Problems, 1(4), 665-706.  abstract


Simpson, D. D. (1973). Patterns of respiratory behavior. Physiological Psychology, 1(2), 141-146.  abstract


Chatham, L. R., & Sells, S. R. (1974). Evaluation of treatment for drug abuse based on the Joint NIMH-TCU Drug Abuse Reporting Program (DARP). In E. Senay, V. Shorty, & H. Alksne (Eds.), Developments in the field of drug abuse: National Drug Abuse Conference, 1974. Cambridge, MA: Schenkman Publishing Company, Inc.

Flexman, J. E., Demaree, R. G., & Simpson, D. D. (1974). Respiratory phase and visual signal detection. Perception of Psychophysics, 16(2), 337-339. abstract

Simpson, D. D., & Nelson, A. E. (1974). Attention training through breathing control to modify hyperactivity. Journal of Learning Disabilities, 7(5), 274-283. abstract

Simpson, D. D., & Sells, S. B. (1974). Patterns of multiple drug abuse: 1969-1971. International Journal of the Addictions, 9(2), 301-314.  abstract