- Robert E. Drake, Kim T. Mueser, Mary F. Brunette, Gregory J. McHugo (2006). A Review of Treatments for People with Severe Mental Illnesses and Co-Occurring Substance Use Disorders. Psychiatric Rehabilitation Journal, v27, n4 Spring, p360-374.
- Robert E. Drake E., Susan M. Essock, Andrew Shaner, Kate B. Carey, Kenneth Minkoff, Lenore Kola, David Lynde, Fred C. Osher, Robin E. Clark, and Lawrence Rickards (2001). Implementing Dual Diagnosis Services for Clients with Severe Mental Illness. Psychiatric Services, v52, April, p469-476.
- D. A. Regier, M. E. Farmer, D. S. Rae, B. Z. Locke, S. J. Keith, L. L. Judd, and F. K. Goodwin (1990). Comorbidity of Mental Disorders with Alcohol and other Drug Abuse. Results from the Epidemiologic Catchment Area (ECA) Study. Journal of the American Medical Association, v264, n19 November, p2511-2518.