@article {6287,
	title = {Morphological diversity in the evolutionary radiation of Paleozoic and post-Paleozoic crinoids},
	journal = {Paleobiology},
	volume = {25},
	number = {2 suppl.},
	year = {1999},
	note = {PDF},
	pages = {115},
	keywords = {crinoids, disparity, echinodermata},
	author = {Foote, Michael}
}
@article {6288,
	title = {Pulsed origination and extinction in the marine realm},
	journal = {Paleobiology},
	volume = {31},
	number = {1},
	year = {2005},
	note = {PDF},
	pages = {6{\textendash}20},
	keywords = {evolution, paleontology, stasis, turnover pulse},
	author = {Foote, Michael}
}
