@article{Ekholm2010,
author = {Ekholm, O. and Gundgaard, J. and Rasmussen, N.K.R. and Hansen, E.H.},
title= {The effect of health, socio-economic position, and mode of data collection on non-response in health interview surveys},
year = {2010},
doi = {10.1177/1403494810382474},
volume = {38},
number = {7},
pages = {699--706},
}