I am currently writing a strategic research report and am having trouble finding 15 peer-reviewed articles. The topic that I am writing my report on is for the Oregon Department of Corrections and is as follows:

I need to review the research around Severity Codes.  Particularly, I need to discuss how are other states categorizing crimes and how are they using them in correctional facilities. Additionally, I have to identify if there is a common metric or criteria for categorizing offenses.

What are 15 peer-reviewed articles that will help me in comparing how other states are categorizing crimes and how they are using them in correctional facilities?