Baldry, A. C., & Farrington, D. P. (2000). Bullies and delinquents: Personal characteristics and parental styles. Journal of Community & Applied Social Psychology, 10(1), 17-31. http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1099-1298(200001/02)10:1%3C17::AID-CASP526%3E3.0.CO;2-M/abstract