C. Li, V. M. Lubecke, O. Boric-Lubecke, and J. Lin, “A review on recent advances in Doppler radar sensors for non-contact healthcare monitoring,” IEEE Trans. Microw. Theory Techn., vol. 61, no. 5, pp. 2046-2060, May. 2013.
J. Wang, X. Wang, Z. Zhu, J. Huangfu, C. Li, and L. Ran, “1-D microwave imaging of human cardiac motion: An abinitio investigation,” IEEE Trans. Microw. Theory Techn., vol. 61, no. 5, pp. 2101-2107, May. 2013.
W. Massagram, V. M. Lubecke, A. Høst-Madsen, and O. Boric-Lubecke, “Assessment of heart rate variability and respiratory sinus arrhythmia via Doppler radar,” IEEE Trans. Microw. Theory Techn., vol. 57, no. 10, pp. 2542-2549, Oct. 2009.
C. Li, J. Lin, and Y. Xiao, “Robust overnight monitoring of human vital signs by a non-contact respiration and heart-beat detector,” in Proc. 28th Annu. Int. Conf. IEEE Eng. Med. Biol. Soc. (EMBS), pp. 2235-2238, Aug./Sep. 2006.
J.-S. Wong, W.-A. Lu, K.-T. Wu, M. Liu, G.-Y. Chen, and C.-D. Kuo, “A comparative study of pulse rate variability and heart rate variability in healthy subjects,” J. Clin. Monitoring Comput., vol. 26, no. 2, pp. 107-114, Feb. 2012.