@article{Saelens2008,
author = {Saelens, B.E. and Handy, S.L.},
title= {Built environment correlates of walking: A review},
year = {2008},
doi = {10.1249/MSS.0b013e31817c67a4},
journal = {Medicine and Science in Sports and Exercise},
volume = {40},
number = {7},
pages = {S550--S566},
}