@article {heifetz2004evolutionary,
	title = {The evolutionary role of toughness in bargaining},
	journal = {Games and Economic Behavior},
	volume = {49},
	number = {1},
	year = {2004},
	pages = {117{\textendash}134},
	publisher = {Academic Press},
	author = {Heifetz, Aviad and Segev, Ella}
}
