@article{Tatem2012,
author = {Tatem, A.J. and Hemelaar, J. and Gray, R.R. and Salemi, M.},
title= {Spatial accessibility and the spread of HIV-1 subtypes and recombinants},
year = {2012},
doi = {10.1097/QAD.0b013e328359a904},
journal = {Aids},
volume = {26},
number = {18},
pages = {2351−2360},
}