@article {592,
	title = {Beitrage zu der Kenntnis der Gephyreen aus dem Malayischen Archipel},
	journal = {Natuurkundig Tijdschrift voor Nederlandisch-Indie},
	volume = {41},
	year = {1881},
	pages = {84-108},
	author = {Sluiter, C. P.}
}
@article {591,
	title = {Beitrage zu der Kenntniss der Gephyreen aus dem Malayischen Archipel. Zweite Mittheilung},
	journal = {Natuurkundig Tijdschrift voor Nederlandisch-Indie},
	volume = {41},
	year = {1881},
	pages = {148-171},
	author = {Sluiter, C. P.}
}
@article {208,
	title = {Fra den norske Norhavsexpedition (1876-1878){\textendash}Gephyreer},
	journal = {Nytt Magasin for Naturvidenskapene},
	volume = {26},
	year = {1881},
	pages = {44-66},
	author = {Danielssen, D. C. and Koren, J.}
}
@article {117,
	title = {Zur Anatomie des <i>Sipunculus nudus</i> L},
	journal = {Zoologischer Anzeiger},
	volume = {4},
	year = {1881},
	pages = {477-481},
	author = {Andreae, J.}
}
