1. Collapse—How Societies Choose to Fail or Succeed;Diamond,2005
2. Environmental Science—Understanding, Protecting and Managing the Environment in the Baltic Sea Region,2003
3. Jorden en ö: En Global Miljöhistoria;Sörlin,1998
4. Ships Logs of 1722 Voyage of Jacob Roggeveen
https://www.easterisland.travel/easter-island-facts-and-info/history/ship-logs-and-journals/jacob-roggeveen-1722/
5. Early Settlement of Rapa Nui (Easter Island)
https://core.ac.uk/download/pdf/5105427.pdf