@techreport{Blom2010,
author = {Blom, A.G. and De Leeuw, E.D. and Hox, J.J.},
title= {Interviewer effects on nonresponse in the European social survey},
year = {2010},
publisher = {University of Essex, Institute for Social and Economic Research},
address = {Colchester},
institution = {Working paper 2010-25},
}