Q. Can you tell me where there are articles on drug decriminalization?

Try advanced search functions in any of these

• JSTOR -
  • use disciplines called sociology, health policy, criminology, or law   
  • use "marijuana" or "drug decriminalization" for terms
•  EBSCO Academic search complete
  • use keywords decriminalization of illegal drugs, drug decriminalization, legalization of illegal drug
• Elsevier  
  • use keywords "drug decriminalization AND [your preferred word here]"
• Academic One File/Infotrac
  • use keywords "narcotics legalization"
• Proquest Research Library 
  • ​​use keywords "medical marijuana or drug legalization"  

Successful journals for drug decriminalization and the legalization topic (alpha by title):

• Drug and Alcohol dependence
• International Journal of Drug Policy
• Journal of Criminal Justice

Preparing a debate ? see FAQ  http://askus.bentley.edu/faq/221007 which focuses on the legal controversy of drug decriminalization. 

This FAQ #221006 focuses more on the health and psychology aspects of drug decriminalization.