Woolley D. Motility of spermatozoa at surfaces. Reproduction. 2003;126:259-70 pubmed
..It is the gradual suppression of this torsion, by either impedance at the solid boundary or by raised viscosity, that converts the 'twisted planar' shape into a planar wave. ..
Woolley D, Gadelha C, Gull K. Evidence for a sliding-resistance at the tip of the trypanosome flagellum. Cell Motil Cytoskeleton. 2006;63:741-6 pubmed
..Thus, it can be assumed that in trypanosomes microtubule sliding at the flagellar tip is resisted sufficiently to permit bend formation. ..
Woolley D. A novel motility pattern in quail spermatozoa with implications for the mechanism of flagellar beating. Biol Cell. 2007;99:663-75 pubmed
..At the same time, the origin of the oscillation typically shifts proximally in a stepwise fashion. These movements have been analysed in the hope of contributing to the resolution of problems in flagellar mechanics...
Woolley D, Carter D, Tilly G. Compliance in the neck structures of the guinea pig spermatozoon, as indicated by rapid freezing and electron microscopy. J Anat. 2008;213:336-41 pubmed publisher