References

1) http://www.berggorilla.org/english/faq/dvers/fragen/verbreit.html
2) www.berggorilla.org/english/faq/dvers/fragen/verbreit.html - 3k
3) www.enchantedlearning.com/subjects/apes/gorilla/
4) http://en.wikipedia.org/wiki/Gorillas#Physical_characteristics
5) http://www.berggorilla.org/english/faq/dvers/fragen/fressen.html