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Yeragani, Vikram K and Mallavarapu, Mallika and Radhakrishna, Rao KA and Tancer, Manuel and Uhde, Thomas (2004) Linear and nonlinear measures of blood pressure variability: Increased chaos of blood pressure time series in patients with panic disorder. In: Depression and Anxiety, 19 (2). pp. 85-95.
Yeragani, Vikram K and Roose, Steven and Mallavarapu, Mallika and Radhakishna, RKA and Pesce, Vanessa (2002) Major depression with ischemic heart disease: Effects of paroxetine and nortriptyline on measures of nonlinearity and chaos of heart rate. In: Neuropsychobiology, 46 (3). pp. 125-135.