[1] A. Periasamy, M. Singh, B. M. Sivaram. Detection of human activity at apexregion by laser speckle. Current Science, 1981, 50(7): 302～304
[2] A. Periasamy, M. Singh. Reconstruction of cardiac displacement patterns on the chest wall by laser speckle interferometry. IEEE Trans. BME, 1985, 4(1): 52～58
[3] M. Singh, G. Ramachandran. Reconstruction of sequential cardiac in-plane displacement patterns on the chest wall by laser speckle interferometry. IEEE Trans. BME, 1991, 38(5): 483～489
[4] G. Brown, L. H. Boxler, P. K. C. Chun et al.. Study of human cardiac cycle using holographic interferometry. SPIE, 1990, 1396: 164～173
[5] G. Pedrini, B. Pfister, H. Tiziani. Double pluse electronic speckle interferometry. J. Mod. Opt., 1993, 40(1): 89～96
[8] X. Peng, S. M. Zhu, Z. Gao. An automatic demodulation technique for a non-linear carrier fringe pattern. Optik, 1995, 100(1): 11～14
[9] P. K. Rastogi. Holographic Interferometry. Berlin: Springer-Verlag, 1994, 110～111: 165～168,156～159
