@article {6244,
	title = {A successive approximations approach to character weighting},
	journal = {Systematic Zoology},
	volume = {18},
	number = {4},
	year = {1969},
	note = {PDF},
	pages = {374-385},
	keywords = {cladistics, phylogenetics, weighting},
	author = {Farris, James S.}
}
