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Zercher, Florian, Schmidt, Peter, Cieciuch, Jan 
ORCID: 0000-0002-2291-8301 and Davidov, Eldad ORCID: 0000-0002-3396-969X
(2015).
The comparability of the universalism value over time and across countries in the European Social Survey: exact vs. approximate measurement invariance.
Frontiers in Psychology, 6.
Lausanne:
Frontiers Research Foundation.
ISSN 1664-1078