C. S. Garbe, Krajsek, K., Pavlov, P., Andres, B., Mühlich, M., Stuke, I., Mota, C., Böhme, M., Haker, M., Schucher, T., Scharr, H., Aach, T., and Barth, E.,
“Nonlinear analysis of multi-dimensional signals: local adaptive estimation of complex motion and orientation patterns”,
Mathematical Methods in Time Series Analysis and Digital Image Processing. Springer, pp. 231-288, 2008.