1. Cai, B., Yang, W., Cao, D., Liu, L., Zhou, Y. and Zhang, Z., (2012). Estimates of China's national and regional transport sector CO2 emissions in 2007. Energy Policy, 41, pp.474–483.
2. Chen, W., & Lei, Y. (2017). Path analysis of factors in energy-related CO2 emissions from Beijing’s transportation sector. Transportation Research Part D: Transport and Environment, 50, 473–487.
3. Chiou, Y. C., Wen, C. H., Tsai, S. H., & Wang, W. Y. (2009). Integrated modelling of car/motorcycle ownership, type, and usage for estimating energy consumption and emissions. Transportation Research Part A: Policy and Practice, 43(7), 665–684.
4. Chukwu, P.U., Isa, A.H., Ojosu, J.O. and Olayande, J.S., 2015. Energy consumption in the transport sector in Nigeria: Current situation and ways forward. Energy, 5(1).
5. Cortés, C. E., Vargas, L. S., & Corvalán, R. M. (2008). A simulation platform for computing energy consumption and emissions in transportation networks. Transportation Research Part D: Transport and Environment, 13(7), 413–427.