@article {1830,
	title = {Eine eigentuemliche Verdoppelung des Kopulationsaparates bei <i>Polycelis tenuis</i> Ijima},
	journal = {Zoologischer Anzeiger},
	volume = {72},
	year = {1927},
	pages = {243-249},
	author = {Roman Kenk}
}
@article {348,
	title = {The planarians (Turbellaria: Tricladida, Paludicola) of Lake Ohrid in Macedonia},
	number = {280},
	year = {1978},
	url = {http://www.sil.si.edu/smithsoniancontributions/Zoology/pdf_hi/SCTZ-0280.pdf},
	author = {Roman Kenk}
}
