Czimek, J., Backhaus, T. Julkaisussa Volleyball-Magazin (2019) “...Switzerland...”
Osthoff,M., Michel, F., Strupler, M., Miedinger, D., Taegtmeyer, A. B., Leuppi, J. D., Perret, C. Julkaisussa BMC Sports Science, Medicine and Rehabilitation (2013) “...Switzerland...”