Larry A. Kroutil, David L. Van Brunt, Mindy A. Herman-Stahl, David C. Heller, Robert M. Bray, Michael A. Penne,
Nonmedical use of prescription stimulants in the United States. Drug and Alcohol Dependence. ,vol. 84, pp. 135- 143 ,(2006) ,
10.1016/J.DRUGALCDEP.2005.12.011