@article{Vercruyssen2011,
author = {Vercruyssen, A. and van de Putte, B. and Stoop, I.A.L.},
title= {Are they really too busy for survey participation? The evolution of busyness and busyness claims in Flanders},
year = {2011},
journal = {Journal of Official Statistics },
volume = {27},
number = {4},
pages = {619−632},
}