FEROZ, Ehsan et al. "Obamacare and environmental production efficiency rankings for the 50 U.S. state governments: A Data Envelopment Analysis of health outcomes from environmental factors and state health care expenditures.". Journal of Economics and Banking, [S.l.], v. 3, n. 1, feb. 2017. ISSN 2376-2160. Available at: <https://esmed.org/MRA/econ/article/view/822>. Date accessed: 29 mar. 2024. doi: https://doi.org/10.18103/jeb.v3i1.822.