@article {643,
	title = {The Triassic seed cone Telemachus from Antarctica},
	journal = {Review of Palaeobotany and Palynology},
	volume = {78},
	year = {1993},
	pages = {269-276},
	chapter = {269},
	author = {Yao, X. and Taylor, Thomas N. and Taylor, Edith L.}
}
@book {627,
	title = {Palaeobotany and the evolution of plants},
	year = {1993},
	pages = {521},
	publisher = {Cambridge university Press},
	organization = {Cambridge university Press},
	address = {Cambridge},
	url = {http://books.google.nl/books?id=Fhm-oed74JgC},
	author = {Stewart, Wilson Nichols and Rothwell, Gar W.}
}
@inbook {553,
	title = {Gymnospermophyta},
	booktitle = {The fossil record 2},
	year = {1993},
	pages = {795-808},
	publisher = {Chapman \& Hall},
	organization = {Chapman \& Hall},
	address = {London},
	author = {Cleal, Chris J.},
	editor = {Benton, M.J.}
}
