Moshel, S., Zivotofsky, A. Z., Jin-Rong, L., Engbert, R., Kurths, J., Kliegl, R., Havlin, S. (2008): Persistence of phase synchronisation properties of fixational eye movements. - European Physical Journal - Special Topics, 161, 1, 207-223.https://doi.org/10.1140/epjst/e2008-00762-3