1. Alaska Cruise Ship Initiative. Part 2. Alaska Department of Environmental Conservation;ADEC – Alaska Department of Environmental Conservation,2001
2. Common resources and institutional sustainability;Agrawal,2002
3. Recreation and tourism: an ecosystem service in itself?;Amelung,2013
4. Noise pollution;ASCOBANS – Agreement on the Conservation of Small Cetaceans of the Baltic and North Seas,2009
5. European Cruise Council 2012/2013 Report;Ashcroft,2014