Bibliography (14):

1. https://books.google.com/books?id=M0lvrgEACAAJ

2. https://gwern.net/doc/psychology/personality/openness/1996-mccrae.pdf#page=4

3. https://gwern.net/doc/psychology/personality/openness/1996-mccrae.pdf#page=6

4. https://gwern.net/doc/psychology/personality/openness/1996-mccrae.pdf#page=8

5. Wikipedia Bibliography:

   1. Openness to experience

   2. https://en.wikipedia.org/wiki/Milton_Rokeach  :

      https://en.wikipedia.org/wiki/Milton_Rokeach

   3. Neuroticism

   4. Extraversion and introversion

   5. Agreeableness

   6. Conscientiousness § Personality models  :

      https://en.wikipedia.org/wiki/Conscientiousness#Personality_models

   7. Facet (psychology)  :

      https://en.wikipedia.org/wiki/Facet_(psychology)

   8. Conscientiousness

   9. Hans Eysenck

   10. Variance