1Cleveland, C. & Ruth, M. Indicators of Dematerialization and the Materials Intensity of Use[J]. Journal of Industrial Ecol-ogy,1999,2(3) :15 -50.
2Mont, O. Clarifying the Concept of Product - Service System [ J ]. Journal of Cleaner Production,2002,10 ( 3 ) :237 - 245.
3Arnold Tukker. EIGHT TYPES OF PRODUCT - SERVICE SYSTEM : EIGHT WAYS TO SUSTAINABILITY EXPERIENCES FROM SUSPRONET. Business Strategy and the Environment, Bus. Strat. Env,2004,13:246 -260 (2004).
4Hargroves, K. , Stasinopoulos, P. and Smith, M. ' Sustain- able IT' through 'Sustainable Product Service Systems' , a case study of Hewlett Packard, The Natural Edge Project (TNEP), Australia ,2007.
5Dan Warren, Calum Dewar. ANALYSIS Understanding 5G Perspectives on future technological advancements in mobile, re- port ,2014,12.
6Hafedh Chourabi, Taewoo Nam, Shawn Walker, et al. Un- derstanding Smart Cities : An Integrative Framework [ A ]. 2012 45th Hawaii International Conference on System Sciences,2012: 2290 - 2297.
