@article{Christensen2013,
author = {Christensen, A.I. and Ekholm, O. and Glümer, C. and Juel, K.},
title= {Effect of survey mode on response patterns: Comparison of face-to-face and self-administered modes in health surveys},
year = {2013},
doi = {10.1093/eurpub/ckt067},
volume = {24},
number = {2},
pages = {327‒332},
}