Siennick, Sonja E., Alex O. Widdowson, Mathew Woessner, and Mark E. Feinberg. 2015 (print version forthcoming). “Internalizing Symptoms, Peer Substance Use, and Substance Use Initiation” Journal of Research on Adolescence. Early View doi: 10.1111/jora.12215.

Connolly, Eric J., Joseph A. Schwartz, Joseph L. Nedelec, Kevin M. Beaver, and J.C. Barnes. 2015. “Different Slopes for Different Folks: Genetic Influences on Growth in Delinquent Peer Association and Delinquency during Adolescence” Journal of Youth and Adolescence 44 (July):1413-1427.

Beaver, Kevin M., Brian B. Boutwell, J.C. Barnes, Joseph A. Schwartz, and Eric J. Connolly. 2014. “A Quantitative Genetic Analysis of the Associations among Language Skills, Peer Interactions, and Behavioral Problems in Childhood: Results from a Sample of Twins” Merrill-Palmer Quarterly 60 (Spring):142-167.

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