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2. Neuroticism and handwriting;Eysenck;J. abnorm. soc. Psychol.,1948
3. Personality and Individual Differences: a Natural Science Approach;Eysenck,1985
4. Manual of the Eysenck Personality Questionnaire;Eysenck,1975
5. The genetic and environmental architecture of psychoticism, extraversion and neuroticism;Fulker,1981