@book {309850,
	title = {Aggression and Peacefulness in Humans and Other Primates},
	year = {1992},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	isbn = {9780195361230},
	url = {https://books.google.com/books?id=5CQW4vPNH-EC},
	author = {Silverberg, J. and Gray, J.P.}
}
