Beierlein, Constanze, Eldad Davidov, Peter Schmidt, Shalom H. Schwartz, and Beatrice Rammstedt. “Testing the Discriminant Validity of Schwartz’ Portrait Value Questionnaire Items – A Replication and Extension of Knoppen and Saris (2009)”. Survey Research Methods 6, no. 1 (April 25, 2012): 25–36. Accessed April 26, 2024. https://ojs.ub.uni-konstanz.de/srm/article/view/5092.