1. Index Mundi (2013) Giappone Popolazione Profilo 2012. CIA World Factbook
2. http://www.indexmundi.com/it/giappone/popolazione_profilo.html . Accessed 07 January 2014
3. Amelung T, Diehl M (1992) Deforestation of tropical rain forests: economic causes and impact on development. Mohr, J.C.B
4. RCF (2013) Rainforest Conservation Fund
5. http://www.rainforestconservation.org/rainforest-primer/7-special-topics/a-the-global-timber-trade-a-brief-discussion/1-sources-of-timber . Accessed 28 November 2013