@article {2008,
	title = {Optimal Strokes for Low Reynolds Number Swimmers: An Example},
	journal = {J. Nonlinear Sci. 18 (2008) 277-302},
	year = {2008},
	publisher = {Springer},
	abstract = {Swimming, i.e., being able to advance in the absence of external forces by performing cyclic shape changes, is particularly demanding at low Reynolds numbers. This is the regime of interest for micro-organisms and micro- or nano-robots. We focus in this paper on a simple yet representative example: the three-sphere swimmer of Najafi and Golestanian (Phys. Rev. E, 69, 062901-062904, 2004). For this system, we show how to cast the problem of swimming in the language of control theory, prove global controllability (which implies that the three-sphere swimmer can indeed swim), and propose a numerical algorithm to compute optimal strokes (which turn out to be suitably defined sub-Riemannian geodesics).},
	doi = {10.1007/s00332-007-9013-7},
	url = {http://hdl.handle.net/1963/4006},
	author = {Fran{\c c}ois Alouges and Antonio DeSimone and Aline Lefebvre}
}
