1K. Kawahara,Y. Yamauchi. Spectral analysis on fluctuation of heat period in paralyzed, vagotomized, and unanesthetized decerebrate cats[J] 1990,Biological Cybernetics(4):251~256
2V. L. Schechtman,K. A. Kluge,R. M. Harper. Time-domain system for assessing variation in heart rate[J] 1988,Medical & Biological Engineering & Computing(4):367~373