1. Rehm J, Patra J, Degenhardt L. Psychoactive substance use: Epidemiology and burden of disease. In: Saxena S, Poznyak V, editors. Atlas on Substance Use (2010): Resources for the Prevention and Treatment of Substance Use Disorders. France: World Health Organization; 2010. p. 7-22.
2. Fudala PJ, Johnson RE. Alternative Pharmacotherapies for Opioid Addiction. In Ruiz P, Strain EC (editors) Lowinson and Ruiz′s Substance Abuse: A Comprehensive Textbook. Philadelphia: Lippincott Williams and Wilkins; 2011. p. 494-500.