Marked signal improvement by stochastic resonance for aperiodic signals in the double-well system R. Mingesz, Z. Gingl and P. Makra Eur. Phys. J. B, 50 1-2 (2006) 339-344 Published online: 12 April 2006 DOI: 10.1140/epjb/e2006-00135-8