Wadsworth, S. J., DeFries, J. C., Willcutt, E. G., Pennington, B. F., & Olson, R. K. (2015). The Colorado Longitudinal Twin Study of Reading Difficulties and ADHD: Etiologies of Comorbidity and Stability. Twin Res Hum Genet.

Wadsworth, Sally J., John C. DeFries, Erik G. Willcutt, Bruce F. Pennington, and Richard K. Olson. "The Colorado Longitudinal Twin Study of Reading Difficulties and ADHD: Etiologies of Comorbidity and Stability." Twin Res Hum Genet 2015.

Wadsworth, Sally J., et al. "The Colorado Longitudinal Twin Study of Reading Difficulties and ADHD: Etiologies of Comorbidity and Stability." Twin Res Hum Genet 2015.