ARBEL, Yuval. Population Density and Air Pollution: Should Incentives Be the Same Across U.S. Cities and States?. REGION, Vienna, Austria, v. 13, n. 2, p. 101–114, 2026. DOI: 10.18335/region.v13i2.672. Disponível em: https://openjournals.wu.ac.at/ojs/index.php/region/article/view/672. Acesso em: 16 sep. 2026.