Persyn, U., de Maeyer, J., Vervaecke, H. Julkaisussa Swimming II: Proceedings of the Second International Symposium on Biomechanics in Swimming, Brussels, Belgium (1975)
Ayalon, A., van Gheluwe, B., Kanitz, M. Julkaisussa Swimming II: Proceedings of the Second International Symposium on Biomechanics in Swimming, Brussels, Belgium (1975)