@article{Biemer2013,
author = {Biemer, P.P. and Chen, P. and Wang, K.},
title= {Using level-of-effort paradata in non-response adjustments with application to field surveys},
year = {2013},
doi = {10.1111/j.1467-985X.2012.01058.x},
journal = {Journal of the Royal Statistical Society: Series A},
volume = {176},
number = {1},
pages = {147−168},
}