string: (Smith et al., 1985) (Schwartzkopff and Winter, 1960) (Dtiring et al., 1983) (this study) (Smith, 1981) (Schwartzkopff and Winter, 1960) (Schwartzkopff and Winter, 1960) (Tilney and Tilney, 1986) (Tilney and Saunders, 1983) (Hirokawa, 1978) (this study) (Tanaka and Smith, 1978) (Btktsy, 1944)…