@article {418,
	title = {<i>Sipunculus nudus</i>},
	journal = {Zeitschrift fur Wissenschaftliche Zoologie},
	volume = {68},
	year = {1900},
	pages = {261-322},
	author = {Metalnikoff, S. J.}
}
@article {597,
	title = {Gephyriens (Sipunculides et Echiurides) provenant des campagnes de l{\textquoteright}Hirondelle et de la Princesse Alice, 1886-1897},
	journal = {Resultates des Campagnes Scientifique accomplies sur son yacht sur Albert I, Prince Souverain d Monaco},
	volume = {15},
	year = {1900},
	pages = {1-29},
	author = {Sluiter, C. P.}
}
