1. Al-Jarrah, O. Y., Yoo, P. D., Muhaidat, S., Karagiannidis, G. K., & Taha, K. (2015). Efficient machine learning for big data: A review. Big Data Research, 2(3), 87–93.
2. American Hotel and Lodging Association. (2020). Covid-19’S impact on the hotel industry. American Hotel and Lodging Association. Retrieved April 12, 2020, from https://www.ahla.com/covid-19s-impact-hotel-industry.
3. Baranik, L. E., Cheung, J. H., Sinclair, R. R., & Lance, C. E. (2019). What happens when employees are furloughed? A resource loss perspective. Journal of Career Development, 46(4), 381–394.
4. Beauté, J., Sandin, S., de Jong, B., Hallström, L. P., Robesyn, E., Giesecke, J., & Sparén, P. (2019). Factors associated with Legionnaires’ disease recurrence in hotel and holiday rental accommodation sites. Eurosurveillance, 24(20).
5. Bereau of Labor Statistics. (2020). The employment situation — March 2020. US Department of Labor. Retrieved April 13, 2020, from https://www.bls.gov/news.release/pdf/empsit.pdf.