@article {6899,
	title = {Extant mammal body masses suggest punctuated equilibrium},
	journal = {Proceedings of the Royal Society of London. Series B},
	volume = {275},
	year = {2008},
	note = {PDF},
	pages = {2195-2199},
	keywords = {evolution, macroevolution, mammalia, punctuated equilibrium},
	author = {Mattila, Tiina M. and Bokma, Folmer}
}
