@article {7260,
	title = {Evolutionary catastrophes, punctuated equilibria and gradualism in ecosystem evolution},
	journal = {Proceedings of the Royal Society of London. Series B},
	volume = {253},
	year = {1993},
	note = {PDF},
	pages = {137-141},
	keywords = {ecology, ecosystem, evolution, extinction, punctuated equilibrium, red queen},
	author = {Rand, D. A. and Wilson, H. B.}
}
