3Matthias S, Stanislav G. Biological Micro- and Nanotribology: Nature's Solutions. Berlin: Springer-Verlag Berlin Heidelberg, 2004. 68-71.
4Ball P. Engineering: Shark skin and other solutions. Nature, 1999, 400:507-508.
5Bechert D W, Bruse M, Hage W, et al. Biological surface and their technological application-laboratory and flight experiments on drag reduction and separation control. New York: AIAA, 1997.1-34.
6Koeltzsch K, Dinkelacker A, Grundmann R. Flow over convergent and divergent wall riblets. Exp Fluids, 2002, 33:346-350.
7Gebeshuber C, Stachelberger H, Drack M. Diatom bionanotribology-biological surfaces in relative motion: their design, friction, adhesion, lubrication and wear. J Nanosci Nanotech, 2005, 5:1-9.
8Bechert D W, Bartenwerfer M, Hoppe G , et al. Drag reduction mechanisms derived from shark skin. New York: AIAA, 1986. 7-12.
9Springer V G, Gold J P. Sharks in question: the Smithsonian answer book. Washington: London Smithsonian Institution Press, 1989. 102-106.
10Raschi W, Elsom J. Comments on the structure and development of the drag reduction-type placoid scale. Indo-Paci Bio, 1986, 408-424.
