@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},
}