@article{Schwarzer1991,
author = {Schwarzer, R. and Leppin, A. and Laszweska, A. and Mayer, S.},
title= {Social support and health: A theoretical and empirical overview},
year = {1991},
doi = {10.1177/0265407591081005},
volume = {8},
number = {1},
pages = {99--127},
}