1. Aaslid R. Developments and principles of transcranial Doppler. In: Newell DW, Aaslid R, editors. Transcranial doppler. New York: Raven Press Ltd.; 1992. p. 1–8.
2. Aaslid R. Hemodynamics of cerebrovascular spasm. Acta Neurochir. 1999;Suppl 72:47–57.
3. Bassingthwaighte JB, Liebovitch LS, West BJ. Fractal measures of heterogeneity and correlation. In: Bassingthwaighte JB, Liebovitch LS, West BJ, editors. Fractal physiology. Oxford: Oxford University Press; 1994. p. 63–107.
4. Bellapart J, et al. The effect of ventricular assist devices on cerebral blood flow and blood pressure fractality. Physiol Meas. 2011;32(9):1361–72.
5. Blaber AP, et al. Complexity of middle cerebral artery blood flow velocity: effects of tilt and autonomic failure. Am J Phys. 1997;273(5 Pt 2):H2209–16.