@book {575,
	title = {Catalogue of the Mollusca in the collection of the British Museum, 2},
	series = {Pteropoda},
	volume = {4},
	year = {1850},
	pages = {45},
	publisher = {British Museum, E. Newman},
	organization = {British Museum, E. Newman},
	address = {London},
	author = {J.E. Gray}
}
@article {572,
	title = {Pteropoda},
	journal = {Tiefsee Exp. 1898-1899},
	volume = {4},
	year = {1905},
	pages = {314},
	chapter = {1},
	author = {J. Meisenheimer}
}
@book {529,
	title = {A zoogeographic and taxonomic review of euthecosomatous pteropoda},
	series = {Oceanic micropaleontology},
	volume = {1},
	year = {1977},
	pages = {733-808},
	publisher = {Academic Press},
	organization = {Academic Press},
	author = {A.W. Be and R.W. Gilmer}
}
@book {554,
	title = {Euthecosomata, a group with remarkable developmental stages (Gastropoda, Pteropoda)},
	year = {1967},
	pages = {375},
	publisher = {J. Noorduyn \& ZN, Gorinchem},
	organization = {J. Noorduyn \& ZN, Gorinchem},
	author = {S. Van Der Spoel}
}
