References

Uhlenbroek, Charlotte. Vida animal. Pearson Alhambra, 2009. Pp. 121, 221, 287.

Alderton, David. The encyclopedia of animals. Chartwell books, Inc., 2009. Pp. 404, 405, 409, 411, 421.

O’Shea, Mark. Venomous Snakes of the World. New Holland Publishers, 2008.

Bartlett, Richard et.al. Snakes: Everything about Selection, Care, Nutrition, Diseases, Breeding, and Behavior. Barron’s Educational Series, 1998.

Enciclopedia del mundo animal. Parragon, 2013. Pp.142-149.

http://en.wikipedia.org/wiki/Snake

http://mdc.mo.gov/discover-nature/common-plants-and-animals/amphibians-and-reptiles/snakes

http://seaworld.org/en/animal-info/animal-bytes/reptiles/snakes/

http://www.flmnh.ufl.edu/herpetology/fl-snakes/venomous-snakes

http://en.wikipedia.org/wiki/Hydrophiinae

http://www.bbc.com/earth/story/20141204-fishing-for-deadly-sea-snakes

http://animaldiversity.org

http://www.bbc.com/news/science-environment-20509720

http://www.hsi.org.au/go/to/1281/the-exotic-animal-skin-trade.html#.VItZbWSG-dI