Come out and play: Shyness in childhood and the benefits of organized sports participation
Canadian Journal of Behavioural Science / Revue canadienne des sciences du comportement (2008) - Comment
doi: 10.1037/0008-400x.40.3.153  issn: 1879-2669  issn: 0008-400x 

Leanne C. Findlay, Robert J. Coplan