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Quality in unimode and mixed-mode designs: a multitrait-multimethod approach [journal article]
Source: Survey Research Methods, 4 (2010) 3. p.151-164
Collecting genetic samples in population wide (panel) surveys: feasibility, nonresponse and selectivity [journal article]
Source: Survey Research Methods, 4 (2010) 2. p.121-126
Mobiltelefonerfahrung und Antwortqualität bei Umfragen [journal article]
Source: Methoden, Daten, Analysen (mda), 4 (2010) 2. p.105-125
The impact of incentives and interview methods on response quantity and quality in diary- and booklet-based surveys [journal article]
Source: Survey Research Methods, 4 (2010) 2. p.91-101