@article{Toepoel2009,
author = {Toepoel, V. and Das, M. and Van Soest, A.},
title= {Relating question type to panel conditioning: Comparing trained and fresh respondents},
year = {2009},
doi = {10.18148/srm/2009.v3i2.874},
volume = {3},
number = {2},
pages = {73--80},
}