Tierney, R. T., Higgins, M., Caswell, S. V., Brady, J. ., McHardy, K. ., Driban, J. B., & Darvish, K. (2008). Sex differences in head acceleration during heading while wearing soccer headgear. Journal of athletic training, 43(6), S. 578-584. doi:10.4085/1062-6050-43.6.578

Tierney, Ryan T., Michael Higgins, Shane V. Caswell, Jessica Brady, Krista McHardy, Jeffrey B. Driban, and Kurosh Darvish. "Sex Differences in Head Acceleration During Heading While Wearing Soccer Headgear." Journal of Athletic Training 43, no. 6 (2008): S. 578-584.

Tierney, Ryan T., et al. "Sex Differences in Head Acceleration During Heading While Wearing Soccer Headgear." Journal of Athletic Training 43.6 (2008): S. 578-584.