1. BEAM, J. C. Serial learning and conditioning under real-life stress. J. abnorm. soc. Psychol., 1955, 51, 543-551.
2. BERRY, J. L., & MARTIN, B. GSR reactivity as a function of anxiety, instructions, and sex. J. abnorm. soc. Psychol., 1957, 54, 9-12.
3. COOK, S. W., & HARRIS, R. E. The verbal conditioning of the galvanic skin reflex. J. exp. Psychol., 1937, 21, 202-210.
4. DEANE, G. E., & ZEAMAN, D. Human heart rate during anxiety. Percept. mot. Skills, 1958, 8, 103-106.
5. DEANE, G. E. Human heart rate responses during experimentally induced anxiety. J. exp. Psychol., 1961, 61, 489-493.