Heinen, T., Supej, M., Cuk, I. Julkaisussa Scandinavian Journal of Medicine & Science in Sports (2017)
Coate, D., Sun, R. Julkaisussa Scandinavian Journal of Medicine & Science in Sports (2013)
Krentz, E. M., Warschburger, P. Julkaisussa Scandinavian Journal of Medicine & Science in Sports (2013)