Schinkel, S., Zamora-López, G., Dimigen, O., Sommer, W., Kurths, J. (2012): Order Patterns Networks (ORPAN) - a method to estimate time-evolving functional connectivity from multivariate time series. - Frontiers in Computational Neuroscience, 6, 91.https://doi.org/10.3389/fncom.2012.00091