Vandorpe, B., Vandendriessche, J., Vaeyens, R., Pion, J., Matthys, S., Lefevre, J., Philippaerts, R., Lenoir, M. Julkaisussa Journal of Science and Medicine in Sport (2012)
Klusemann, M., Fay, T., Pyne, D., Drinkwater, E. Julkaisussa Journal of Science and Medicine in Sport (2011)