References

Prolactin, the hormone of Paternity

Carsten Schradin and Gustl Anzenberger

News in Physiological Sciences, Vol. 14, No. 6, 223-231, December 1999

 

Kidnapping of chicks in emperor penguins: a hormonal by-product?

Frederic Angelier, Christophe Barbraud, Herve Lromee, Fancois Prud'homme and Olivier Chastel

The Journal of Experimental Biology 209, 1413-1420

 


 Websites

http://www.emperor-penguin.com/

http://www.nationalgeographic.com/kids/creature_feature/0101/penguins.html

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

http://animaldiversity.ummz.umich.edu/site/accounts/information/Aptenodytes_forsteri.html

http://www.penguinworld.com/types/emperor.html