@article{Pinquart2003,
author = {Pinquart, M.},
title= {Loneliness in married, widowed, divorced, and never-married older adults},
year = {2003},
doi = {10.1177/02654074030201002},
journal = {Journal of Social and Personal Relationships},
volume = {20},
number = {1},
pages = {31--53},
}