K. E. Petersen and L. Ladefoged, Youth in Gangs. What Do We Know – and What Don’t We Know? A Research Review of National and International Knowledge about Youth in Gangs. Aarhus, DK: AU Library Scholarly Publishing Services, 2018. Accessed: Aug. 16, 2025. [Online]. Available: https://ebooks.au.dk/aul/catalog/book/284