1. Amaya, A., Leclere, F. Carris, K., & Liao, Y. (2015). Where to Start. An Evaluation of Primary Data-Collection Modes in an Adress-Based Sampling Design. Public Opinion Quarterly 79(2), 420–442.
2. Callegaro, M., Lozar Manfreda, K., & Vehovar, V. (2015). Web Survey Methodology. Sage Publications.
3. Cernat, A., & Lynn, P. (2014). The role of E-mail addresses and E-mail contact in encouraging web response in a mixed mode design. Understanding Society Working Paper Series No. 2014 – 10.
4. Collins, D., & Mitchell, M. (2014). Role of mode in respondents’ decisions to participate in IP5: Findings from a qualitative follow-up study. Understanding Society Working Paper Series No. 2014 – 03.
5. Dillman, D.A. (2009). Some Consequences of Survey Mode Changes in Longitudinal Surveys. In P. Lynn (Hrsg.), Methodology of Longitudinal Surveys (S. 127-140). Chichester: Wiley.