@article{Leopold2011,
author = {Leopold, T. and Raab, M.},
title= {Short Term Reciprocity in Late Parent-Child Relationships},
year = {2011},
doi = {10.1111/j.1741-3737.2010.00792.x},
journal = {Journal of Marriage and Family },
volume = {73},
number = {1},
pages = {105−119},
}