Rowe, Richard, Barbara Maughan, Andrew Pickles, Elizabeth Jane Costello, and Adrian Angold. "The Relationship between Dsm-Iv Oppositional Defiant Disorder and Conduct Disorder: Findings from the Great Smoky Mountains Study." Journal of Child Psychology and Psychiatry and Allied Disciplines 43, no. 3 (2002): 365-373.

Maughan, Barbara, Andrew Pickles, Richard Rowe, Elizabeth Jane Costello, and Adrian Angold. "Developmental Trajectories of Aggressive and Non-Aggressive Conduct Problems." Journal of Quantitative Criminology 16, no. 2 (2000): 199-221.