@article{Balk2018,
author = {Balk, D. and Leyk, S. and Jones, B. and Montgomery, M.R. and Clark, A.},
title= {Understanding urbanization: A study of census and satellite-derived urban classes in the United States, 1990–2010},
year = {2018},
doi = {10.1371/journal.pone.0208487},
volume = {13},
number = {12},
pages = {e0208487},
}