@article {401,
	title = {Ein neuer Fall von der Ausstossung der Eingeweide bei den Ascidien},
	journal = {Annotationes Zoologicae Japonensis},
	volume = {9},
	year = {1918},
	pages = {393-397},
	author = {Oka, A.}
}
@article {76,
	title = {Ascidians from the Philippines and adjacent waters},
	journal = {United States National Museum Bulletin 100},
	volume = {1},
	number = {2},
	year = {1918},
	pages = {49-174},
	chapter = {49},
	author = {Van Name, W.G.}
}
@article {326,
	title = {Die ptychobranchen und diktyobranchen Ascidien des Westlichen Indischen Ozeans},
	journal = {Jahrbuch der Hamburgischen Wissenchaftlichen Anstalten},
	volume = {35},
	number = {Supplement 2},
	year = {1918},
	pages = {1-73},
	author = {Michaelsen, W.}
}
