@book {540,
	title = {On Aggression},
	year = {2002},
	publisher = {Routledge},
	organization = {Routledge},
	isbn = {9780415283205},
	url = {http://monoskop.org/images/d/d0/Lorenz_Konrad_On_Aggression_2002.pdf},
	author = {Lorenz, K.}
}
