[126] Eckmann J P, Kamphorst S O, Ruelle D. Recurrence plots of dynamical systems[J]. Europhysics Letters (EPL),1987, 4(9): 973-977.
[127] Edwards RH.Human muscle function and fatigue[J]. Ciba Found. Symp, 1981, 82: 1-18.
[128] Farina D. Interpretation of the surface electromyogram in dynamic contractions[J]. Exerc Sport Sci Rev,2006, 34(3): 121-127.
[129] Farina D, Fattorini L, Felici F, et al. Nonlinear surface EMG analysis to detect changes of motor unit conduction velocity and synchronization[J]. Journal of Applied Physiology, 2002, 93(5): 1753-1763.