4Hotelling H.The Economics of Exhaustible Resources[J].Journal of Political Economy,1931,39(2):75.
5Hall D C,Hall J V.Concepts and Measures of Natural Resources Scarcity with a Summary of Recent Trends[J].Journal of Environmental Economics and Management,1984,11(4):79-363.
7Soojin Choi, Xinran Y. Lehto, Alastair M. Morrison. Destination image representation on the web: Content analysis of Macao travel related websites. Tourism Management, 2007.
8JUhoPesonen, Outi-maaria Palo-oja.Information and Communication Technologies in Tourism, 2010.
9Jingxian Jiang, Ulrike Gretzel, Rob Lawa.Information and Communication Technologies in Tourism 2010.
10HouJiannuo, Lixian De.Online travel abroad Progress and Prospects. World geography, 2011.