Trajectories of pure and co-occurring internalizing and externalizing problems from age 2 to age 12: findings from the National Institute of Child Health and Human Development Study of Early Child Care
Developmental Psychology (2010) - Comment
pubmed: 20822230  doi: 10.1037/a0020659  issn: 1939-0599  issn: 0012-1649 

Kostas A. Fanti, Christopher C. Henrich