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(1992) Direct test for determinism in a time series. Phys. Rev. Lett. 68:427-430 Katz, B. (1966) Nerve, Muscle and Synapse. McGraw-Hill. N.Y. Kelly,O.E., Johnson, D.H., Delgutte, B., Cariani, P. (1996)Fractal noise strength in auditory-nerve fiber recordings. J Acoust Soc Am 99:2210-20 Keunen, R.W.,V