@article {4166,
	title = {Polymorphism in Systematics and Comparative Biology},
	journal = {Annual Review of Ecology and Systematics},
	volume = {30},
	year = {1999},
	pages = {327-362},
	keywords = {ECOLOGY, INFRASPECIFIC VARIATION, PHYLOGENY, POLYMORPHISM, Review, SYSTEMATICS},
	author = {Wiens, John J.}
}
@article {4167,
	title = {Character Analysis in Morphological Phylogenetics: Problems and Solutions},
	journal = {Systematic Biology},
	volume = {50},
	number = {5},
	year = {2001},
	pages = {689-699},
	keywords = {phylogenetics},
	author = {Wiens, John J.}
}
