@article{Helleringer2005,
author = {Helleringer, S. and Kohler, H.-P.},
title= {Social networks, perceptions of risk, and changing attitudes towards HIV/AIDS: New evidence from a longitudinal study using fixed-effects analysis.},
year = {2005},
doi = {10.1080/00324720500212230},
journal = {Population Studies},
volume = {59},
number = {3},
pages = {265--282},
}