The provided document appears to be a collection of references to transportation research papers, including articles from journals such as Journal of Air Transport Management, Transportation Research Part C, and Environmental Science & Policy. The papers cover topics such as direct air transport and demand interaction, efficient procurement of public air services, and the environmental and economic impact of the carbon tax in Australia. Additionally, there are references to studies on service innovation, differentiation strategy, and organizational performance nexus, as well as competitive strategies and firm performance. The document also includes a list of authors and publications, which may be useful for students or researchers looking for relevant literature on transportation research.