Krawiecki, A., Kacperski, K., Matyjaskiewicz, S., & Holyst, J. A. (2003). Log-periodic oscillations and noise-free stochastic multiresonance due to self-similarity of fractals. CHAOS SOLITONS & FRACTALS, 18(1), 89-96. doi:10.1016/S0960-0779(02)00602-1.