Kjaer, M., Langberg, H., Dossing, S., Holm, L., Hansen, M., Heinemeier, K., Hansen, P., Schjerling, P., Hassenkam, T., Magnusson, P. Julkaisussa 4th International Congress on Science and Skiing (2007)
E. Müller, H. Schwameder, G. Zallinger, V. Fastenbauer Julkaistu 2003