2National Statistics. Older people[Z]. Social and welfare, 2004.
3Collins D. Gender and differences in travel life cycle [J]. Journal of Travel Research, 2002,41 (2): 133-143.
4Sakai M. Population aging and the Japanese international travel in the 21 st century[J]. Journal of Travel Research, 2000,38(3 ):210-220.
5Weaver P A, McCleary K W, Lepisto L, et al. The relationship of des- tination selection attributes to psychological, behavioral and demo- graphical variables [J]. Journal of Hospitality and Leisure Marketing, 1994,2(2):93-109.
6Zimmer Z, Brayley R, Searle M S. Whether to go and where to go: i- dentification of important influences on seniors' decisions to travel [J]. Journal of Travel Research, 1995,33(3):3-10.
7Lancaster K J, A new approach to consumer theory[J]. Journal of Po- litical Economy, 1996,74:132-157.
8Baloglu S. The relationship between destination images and soeiode- mographic and trip characteristics of international travelers[J]. Jour- nal of Vacation Marketing, 1997,3(3):221-233.
9National Statistics. Population[Z]. UK National Statistics Office, 2003.
10Andy Martin. The changing face of travel in Britain[Z]. MORI, 2004 (12):12-13.