9Ho C. I. , Lee Y. L. , "The development to fane - travel service quality scale", Tourism Management, no. 6, vol. 28, 2007, pp. 1434 - 1449.
10E. O' Neill et al. , "Instrumenting the City: Developing Methods for Observing and Understanding the Digital Cityscape", Proc. 8th Int'l Conf. Ubiquitous Computing ( Ubicomp 2006), LNCS 4206, Springer, 2006, pp. 315 - 332.