1. Global environmental consequences of tourism;Gössling;Global Environmental Change,2002
2. U.S. Energy Information Administration, A look at commercial buildings in 1995: characteristics, energy consumption and energy expenditures, Washington DC, 1998.
3. CHOSE, Energy savings by combined heat cooling and power plants (CHCP) in the hotel sector, Report of the Commission of the European Communities, Directorate General for Energy, Stockholm, 2001.
4. European hoteliers’ environmental attitudes: greening the business;Bohdanowicz;Cornell Hotel and Restaurant Quarterly,2005
5. T. Davies, S. Cahill, Environmental implications of the tourism industry, Resources for the Future, Washington DC, 2000.