Billing, D. C., Hayes, J. P., Nagarajah, C. R., Baker, J. Julkaisussa The Engineering of Sport 5, Volume 2 (2004)
Lin, C. S., Nien, Y. H., Hung, T. Y., Su, C. K., Shiang, T. Y. Julkaisussa The Engineering of Sport 5, Volume 2 (2004)