@article{Helleringer2007,
author = {Helleringer, S. and Kohler, H.-P. and Chimbiri, A.},
title= {Characteristics of external/bridge relationships by partner type and location where sexual relationship took place},
year = {2007},
doi = {10.1097/QAD.0b013e3282f112bd},
journal = {AIDS},
volume = {21},
number = {18},
pages = {2560--2561},
}