@article{Simini2012,
author = {Simini, F. and González, M.C. and Maritan, A. and Barabási, A.L.},
title= {A universal model for mobility and migration patterns},
year = {2012},
doi = {10.1038/nature10856},
journal = {Nature},
volume = {484},
number = {7392},
pages = {96--100},
}