@article{Bengtson1991,
author = {Bengtson, V.L. and Roberts, R.E.L.},
title= {Intergenerational Solidarity in Aging Families: An Example of Formal Theory Construction},
year = {1991},
doi = {10.2307/352993},
journal = {Journal of Marriage and Family},
volume = {53},
number = {4},
pages = {856--870},
}