Cavanagh, P. R., Palmgren, J. V., Kerr, B. A. Julkaisussa Swimming II: Proceedings of the Second International Symposium on Biomechanics in Swimming, Brussels, Belgium (1975)
Jensen, R. K., Blanksby, B. Julkaisussa Swimming II: Proceedings of the Second International Symposium on Biomechanics in Swimming, Brussels, Belgium (1975)