1. Aiba, S. The suppression of the primary visual stimulus. In H. J. Eysenck (Ed.), Experiments with drugs. New York: Pergamon Press, 1963.
2. Bakan, P. Extraversion-introversion and improvement in an auditory vigilance task. British Journal of Psychology, 1959, 50, 325–332.
3. Bakan, P. Effect of meprobamate on auditory vigilance. Perceptual and Motor Skills, 1961, 12, 26.
4. Bakan, P., Belton, J. A., & Toth, J. C. Extraversion-introversion and decrement in an auditory vigilance task. In D. N. Buckner and J. J. McGrath (Eds.), Vigilance: A symposium. New York: McGraw-Hill, 1963.
5. Claridge, G. S. The excitation-inhibition balance in neurotics. In H. J. Eysenck (Ed.), Experiments in personality. New York: Praeger, 1960.