@article {3206,
	title = {Polymorphic taxa, missing values and cladistic analysis},
	journal = {Cladistics},
	volume = {7},
	year = {1992},
	pages = {233-241},
	keywords = {CLADISTICS, POLYMORPHISM},
	author = {Nixon, K. C. and Davis, J. I.}
}
@article {3207,
	title = {Polymorphic taxa, missing values and cladistic analysis},
	journal = {Cladistics},
	volume = {7},
	year = {1993},
	pages = {233-241},
	keywords = {CLADISTICS},
	author = {Nixon, K. C. and Davis, J. I.}
}
@inbook {3209,
	title = {Extinction and the origin of species},
	booktitle = {Extinction and Phylogeny},
	year = {1992},
	pages = {119-143},
	publisher = {Columbia University Press},
	organization = {Columbia University Press},
	address = {New York},
	keywords = {EXTINCTION, PHYLOGENY, species},
	author = {Nixon, K. C. and Wheeler, Q. D.},
	editor = {Novacek, M. J. and Wheeler, Q. D.}
}
@inbook {2295,
	title = {Moncotyledons and their fossil record: a review},
	booktitle = {Monocots II Abstracts},
	year = {1998},
	pages = {21},
	publisher = {RBG},
	organization = {RBG},
	address = {Sydney},
	keywords = {FOSSILS, MONOCOTYLEDON, Review},
	author = {Gandolfo, M. A. and Nixon, K. C. and Crepet, W. L.},
	editor = {Wilson, Karen}
}
