1. The experience of motivation: the theory of psychological reversals;Apter,1982
2. Reversal theory: motivation, emotion and personality;Apter,1989
3. The psychometric identification of psychopathy in mentally abnormal offenders;Barbour-McMullen;Personality and Individual Differences,1988
4. Personality types among abnormal homicides;Blackburn;British Journal of Criminology,1971
5. An empirical classification of psychopathic personality;Blackburn;British Journal of Psychiatry,1975