7Sum C M A,Dewhurst D J. Digital cardiac defibrillator tester[J]. Medical and Biological Engineering and Computing,1979, 17(6):710-714.
8Lerman BB,Deale OC.Relation between transcardiac and transthoracic current during defibrillation in humam[J].Circulation research, 1990,67 (6): 1420-1426.