Bullock, G. S., Faherty, M. S., Ledbetter, L., Thigpen, C. A., Sell, T. C. Julkaisussa Journal of Athletic Training (2018)
Oliver, G. D., Keeley, D. W. Julkaisussa The Journal of Strength and Conditioning Research (2010)
Ellenbecker, T. S., Roetert, E. P., Bailie, D. S., Davies, G. J., Brown, S. W. Julkaisussa Medicine & Science in Sports & Exercise (2002)