Constructive influence of noise-flatness in correlation ratchets D. Martila, R. Mankin, R. Tammelo, A. Sauga and E. Reiter Eur. Phys. J. B, 54 3 (2006) 375-383 Published online: 13 January 2007 DOI: 10.1140/epjb/e2007-00012-0