@article{Dunifon2018,
author = {Dunifon, R.E. and Near, C.E. and Ziol-Guest, K.M.},
title= {Backup parents, playmates, friends: Grandparents’ time with grandchildren},
year = {2018},
doi = {10.1111/jomf.12472},
volume = {80},
number = {3},
pages = {752--767},
}