@article{Von Hippel2007,
author = {Von Hippel, P.T. and Powell, B. and Downey, D.B. and Rowland, N.J.},
title= {Changes in children’s body mass index during the school year and during summer vacation},
year = {2007},
doi = {10.2105/AJPH.2005.080754},
volume = {97},
number = {3},
pages = {1--7},
}