@article{Thomas2017,
author = {Thomas, M. and Mulder, C.H. and Cooke, T.-J.},
title= {Geographical distances between separated parents: A longitudinal analysis},
year = {2017},
doi = {10.1007/s10680-017-9437-1},
volume = {34},
number = {4},
pages = {463--489},
}