Bellamkonda S, Woodward SJ, Campolettano E, Gellner R, Kelley ME, Jones DA, Genemaras A, Beckwith JG, Greenwald RM, Maerlender AC, Rowson S, Duma SM, Urban JE, Stitzel JD, Crisco JJ. Head Impact Exposure in Practices Correlates With Exposure in Games for Youth Football Players. J Appl Biomech. 2018 Oct 01; 34(5):354-360.