@article {pdf,
	title = {Zur {\"O}kologie der alpinen Turbellarien},
	journal = {Zeitschrift f{\"u}r Morphologie und {\"O}kologie der Tiere},
	volume = {5},
	year = {1926},
	note = {2904},
	pages = {424-446},
	type = {article},
	abstract = {Mentions:
Macrostomum appendiculatum
Macrostomum tuba
Macrostomum orthostylum},
	keywords = {Turbellaria},
	author = {Steinb{\"o}ck, O}
}
@book {pdf,
	title = {VII. Marine Turbellaria},
	series = {Zoology of the Faroes},
	year = {1931},
	note = {2644},
	pages = {1-26},
	type = {incollection},
	address = {Copenhagen},
	abstract = {Describes:
Macrostomum ophiocephalum n. sp.
Mentions:
Microstomum rubromaculatum
Microstomum lucidum},
	keywords = {Macrostomum},
	author = {Steinb{\"o}ck, O},
	editor = {Jensen, S and Lundbeck, W and Morthensen, T}
}
@article {pdf,
	title = {Turbellarien aus Ostgr{\"o}nland},
	journal = {Videnskabelige Meddelelser Dansk Naturhistorisk Forening},
	volume = {98},
	year = {1935},
	note = {2646},
	pages = {235-241},
	type = {article},
	abstract = {Describes:
Protomacrostomum groenlandicum n. gen. n. sp.
Copy incomplete.},
	keywords = {Macrostomum},
	author = {Steinb{\"o}ck, O}
}
@article {pdf,
	title = {Freshwater Turbellaria},
	journal = {The Zoology of Iceland},
	volume = {2},
	number = {10},
	year = {1948},
	note = {2813},
	pages = {1-40},
	type = {article},
	abstract = {Mentions:
Macrostomum appendiculatum},
	keywords = {Macrostomum},
	author = {Steinb{\"o}ck, O}
}
@article {pdf,
	title = {Turbellarienstudein am Lago Maggiore. II.},
	journal = {Istituto Italiano di Idrobiolgia {\textquoteright}Dott. Marco De Marchi{\textquoteright}},
	volume = { 6},
	year = {1951},
	note = {2814},
	pages = {165-176},
	type = {article},
	abstract = {Mentions:
Macrostomum appendiculatum
Microstomum lineare},
	keywords = {Macrostomum},
	author = {Steinb{\"o}ck, O}
}
@article {pdf,
	title = {Turbellarienstudien am Lago Maggiore. I.},
	journal = {Istituto Italiano di Idrobiolgia {\textquoteright}Dott. Marco De Marchi{\textquoteright}},
	volume = {6},
	year = {1951},
	note = {2815},
	pages = {137-164},
	type = {article},
	abstract = {Mentions:
Macrostomum tuba (says Macrostomum gigas is the same)
Microstomum lineare},
	keywords = {Macrostomum},
	author = {Steinb{\"o}ck, O}
}
