@article{Hessler1995,
author = {Hessler, R.M. and Jia, S. and Madsen, R. and Pazaki, H.},
title= {Gender, social networks and survival time: a 20-year study of the rural elderly},
year = {1995},
doi = {10.1016/0167-4943(95)00669-C},
journal = {Arch Gerontol Geriatr },
volume = {21},
number = {3},
pages = {291−306},
}