@article{Heylen2012,
author = {Heylen, L. and Mortelmans, D. and Hermans, M. and Boudiny, K.},
title= {The intermediate effect of geographic proximity on intergenerational support: A comparison of France and Bulgaria},
year = {2012},
doi = {10.4054/DemRes.2012.27.17},
volume = {27},
number = {17},
pages = {455--486},
}