C. Vandenbroeck et G. Nicolis, NOISE-INDUCED SENSITIVITY TO THE INITIAL CONDITIONS IN STOCHASTIC DYNAMICAL-SYSTEMS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 48(6), 1993, pp. 4845-4846
It is shown that the occurrence of a positive time-averaged Lyapunov e
xponent in a nonlinear system subject to noise, be it additive or mult
iplicative, does not necessarily imply deterministic chaos.