Twisting and buckling: A new undulation mechanism for artificial swimmers Ghani Oukhaled, Andrejs Cebers, Jean-Claude Bacri, Jean-Marc Di Meglio and Charlotte Py Eur. Phys. J. E, 35 11 (2012) 121 Published online: 23 November 2012 DOI: 10.1140/epje/i2012-12121-y