Su, Qing. “Travel Demand Management Policy Instruments, Urban Spatial Characteristics, and Household Greenhouse Gas Emissions from Travel in the US Urban Areas”. International Journal of Energy Economics and Policy 7, no. 3 (July 18, 2017): 157–166. Accessed July 16, 2024. https://www.econjournals.com/index.php/ijeep/article/view/4305.