@article{Hansen2006,
author = {Hansen, K.M.},
title= {The effects of incentives, interview length, and interviewer characteristics on response rates in a CATI study},
year = {2006},
doi = {10.1093/ijpor/edl022},
journal = {International Journal of Public Opinion Research},
volume = {19},
number = {1},
pages = {112--121},
}