Diamantopoulou, G., and M. Platsidou. “A Short Form of Ego Identity Process Questionnaire (EIPQ-SF): Testing Its Psychometric Properties in Young Adults”. Psychology: The Journal of the Hellenic Psychological Society, vol. 26, no. 1, Mar. 2021, pp. 237-51, doi:10.12681/psy_hps.26231.