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The Three-Step Test-Interview (TSTI): an observation-based method for pretesting self-completion questionnaires [journal article]
Source: Survey Research Methods, 2 (2008) 3. p.143-150
A cross-country and cross-time comparison of the human values measurements with the second round of the European Social Survey [journal article]
Source: Survey Research Methods, 2 (2008) 1. p.33-46