1. WHO Declared the New Disease a Global Pandemichttp://https://covid19.who.int/
2. Special SARS analysis: Impact of travel and tourism (Hong Kong, China, Singapore and Vietnam reports)https://www.hospitalitynet.org/news/4015946.html
3. Greece has Announced that Tourists from 29 Countries, Including China, will be Allowed to Enter the Country from June 15https://k.sina.com.cn/article_5926226.5351613b0a6700100za5x.html?cre=tianyi&mod=pcpager_fin&loc=29&r=9&rfunc=9&tj=none&tr=9
4. The Impact of Novel Coronavirus Outbreak on Tourism Industry and the Countermeasures;Xia;China Bus. Mark.,2020