@article {Chitwood1958,
	title = {The designation of official names for higher taxa of invertebrates},
	journal = {Bulletin of Zoological Nomenclature},
	volume = {15},
	year = {1958},
	pages = {860{\textendash}895},
	author = {Chitwood, B. G.}
}
@article {Sokal1958,
	title = {A statistical method for evaluating systematic relationships},
	journal = {University of Kansas Science Bulletin},
	volume = {38},
	year = {1958},
	pages = {1409{\textendash}1438},
	author = {Sokal, R.R. and Michener, C.D.}
}
