Rotational diffusion in a bistable potential A. Mertelj, J. L. Arauz-Lara, G. Maret, T. Gisler and H. Stark Europhys. Lett., 59 3 (2002) 337-343 Published online: 01 September 2002 DOI: 10.1209/epl/i2002-00199-0