@article {603,
	title = {A re-evaluation of seed plant phylogeny.},
	journal = {Annals of the Missouri Botanical Garden },
	volume = {81},
	year = {1994},
	pages = {484-533},
	chapter = {484},
	url = {http://www.botanicus.org/page/1468815},
	author = {Nixon, K.C. and Crepet, W.L. and Stevenson, D. W. and Friis E.M.}
}
