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Frank TD, Daffertshofer A, Beek PJ.Frank TD, et al. Among authors: daffertshofer a.Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Jan;63(1 Pt 1):011905. doi: 10.1103/PhysRevE.63.011905. Epub 2000 Dec 21.Phys Rev E Stat Nonlin Soft Matter Phys. 2001.PMID: 11304285