Ross, J. L., Zeger, M. P., Kushner, H., Zinn, A. R., & Roeltgen, D. P. (2009). An extra X or Y chromosome: Contrasting the cognitive and motor phenotypes in childhood in boys with 47,XYY syndrome or 47,XXY Klinefelter syndrome.

Ross, Judith L., Martha P.D Zeger, Harvey Kushner, Andrew R. Zinn, e David P. Roeltgen. An Extra X or Y Chromosome: Contrasting the Cognitive and Motor Phenotypes in Childhood in Boys With 47,XYY Syndrome or 47,XXY Klinefelter Syndrome. 2009.

Ross, Judith L., et al. An Extra X or Y Chromosome: Contrasting the Cognitive and Motor Phenotypes in Childhood in Boys With 47,XYY Syndrome or 47,XXY Klinefelter Syndrome. 2009.