@article{Mullan2009,
author = {Mullan, K. and Craig, L.},
title= {Harmonising extended measures of parental childcare in the time-diary surveys of four countries: Proximity versus responsibility},
year = {2009},
doi = {10.13085/eIJTUR.6.1.48-72},
journal = {Electronic International Journal of Time Use Research},
volume = {6},
number = {1},
pages = {48‒72},
}