1. Akselrod, S., J. Arbel, O. Oz, V. Benary, and D. David. Evaluation of autonomous tone during acute myocardial-infarction by spectral-analysis of heart-rate fluctuations. Circulation 72(4):242, 1985.
2. Ayappa, I., R. G. Norman, M. Suryadevara, and D. M. Rapoport. Comparison of limited monitoring using a nasal-cannula flow signal to full polysomnography in sleep-disordered breathing. Sleep 27(6):1171–1179, 2004.
3. Bradley, T. D., and J. S. Floras. Sleep apnea and heart failure—Part I: obstructive sleep apnea. Circulation 107(12):1671–1678, 2003.
4. Gil, E., J. M. Vergara, and P. Laguna. Detection of decreases in the amplitude fluctuation of pulse photoplethysmography signal as indication of Obstructive Sleep Apnea Syndrome in children. Biomed Signal Process. Control. doi: 10.1016/j.bspc.2007.12.002.2008 .
5. Guyton, A. C. Textbook of Medical Physiology 7th ed. Philadelphia: Saunders, 1982.