1. Blom , A. Lynn , P. Jäckle , A. 2008 Understanding Cross-National Differences in Unit Non-Response: The Role of Contact Data. Working paper, Institute for Social and Economic Research ISER
2. Couper , M.P. 1998 Measuring Survey Quality in a CASIC Environment. Proceedings of the Survey Research Methods Section , ASA , pages 41-49
3. Couper , M.P. Lyberg , L. 2005 The Use of Paradata in Survey Research. Proceedings of the 55th Session of the International Statistical Institute , Sydney, Australia
4. Informed Consent for Web Paradata Use;Couper;Survey Research Methods,2013