@article {Ott 1907,
	title = {Heinrich Birnbaum},
	journal = {The Catholic Encyclopedia},
	volume = {2},
	year = {1907},
	note = {<a href="http://www.newadvent.org/cathen/02579a.htm">Elektronisch raadpleegbaar</a>.},
	pages = {579},
	keywords = {biographiae, Henricus de Piro O.Cart. (biographia)},
	author = {Ott, Michael}
}
