@article{Glasner2009,
author = {Glasner, T. and van der Vaart, W.},
title= {Applications of calendar instruments in social surveys: a review},
year = {2009},
doi = {10.1007/s11135-007-9129-8},
journal = {Quality & Quantity},
volume = {43},
number = {3},
pages = {333--349},
}