@article {1650,
	title = {Die stolidobranchiaten der deutschen Tiefsee-Expedition},
	year = {1904},
	author = {Michaelsen, W.}
}
@article {1649,
	title = {Tunicata (Manteltiere)},
	author = {Hartmeyer, R.}
}
@article {1648,
	title = {Die krikobranchien ascidien des westlichen Indischen Ozeans: Didemniden},
	year = {1920}
}
@article {1647,
	title = {South African ascidians collected by Th. Mortensen with some additional material},
	year = {1964},
	author = {Millar, R.H.}
}
