@inbook {58,
	title = {Species of marine invertebrates: a comparison od the biological and phylogenetic species concepts},
	booktitle = {Species: The units of Biodiveristy},
	year = {1997},
	pages = {199-221},
	publisher = {Chapman \& Hall},
	organization = {Chapman \& Hall},
	address = {London},
	author = {Knowlton, N. and Weight, L.},
	editor = {Claridge, M.F. and Dawah, A.H. and Wilson, M.R.}
}
