R. Hegger, H. Kantz, and T. Schreiber, Practical implementation of nonlinear time series methods: The TISEAN package, CHAOS 9, 413 (1999).
T. Schreiber and A. Schmitz, Surrogate time series, Physica D 142 346 (2000). H. Kantz and T. Schreiber, ``Nonlinear Time Series Analysis'', 2nd edition, Cambridge University Press, Cambridge (2004).