@article {6762,
	title = {Phylogenetic systematics turns over a new leaf},
	journal = {Trends in Ecology and Evolution},
	volume = {16},
	number = {1},
	year = {2001},
	note = {PDF},
	pages = {30-37},
	keywords = {likelihood, ML, morphological characters, phylogenetics},
	author = {Lewis, Paul O.}
}
@article {6763,
	title = {A likelihood approach to estimating phylogeny from discrete morphological character data},
	journal = {Systematic Biology},
	volume = {50},
	number = {6},
	year = {2001},
	note = {PDF},
	pages = {913-925},
	keywords = {likelihood, ML, morphological characters, phylogenetics},
	author = {Lewis, Paul O.}
}
