@article{Heerwegh2008,
author = {Heerwegh, D. and Loosfeldt, G.},
title= {Face-to-face versus web surveying in a high-internet-coverage population: Differences in response quality},
year = {2008},
doi = {10.1093/poq/nfn045},
volume = {72},
number = {5},
pages = {836‒846},
}