@article {587,
	title = {Reinvestigation of Nystroemia pectiniformis Halle, an enigmatic seed plant from the Upper Permian of China},
	journal = {Palaeontology},
	volume = {46},
	year = {2003},
	pages = {29-51},
	chapter = {29},
	author = {Hilton, Jason and Li, C.S.}
}
@article {573,
	title = {Defining the gigantopterid concept: a reinvestigation of Gigantopteris (Megalopteris) nicotianaefolia Schenck and its taxonomic implications},
	journal = {Palaeontology},
	volume = {47},
	year = {2004},
	pages = {1339-1361},
	chapter = {1339},
	author = {Glasspool, I.G. and Hilton, Jason and Collinson, M.E. and Wang, S.J.}
}
