@incollection{1999:hartung:eine_klein,
title = {Eine kleine Geschichte der Obligation},
year = {1999},
note = {},
booktitle = {Die Naturrechtsdebatte},
pages = {17--26},
edition = {},
author = {Hartung, Gerald},
publisher = {Karl Alber},
address = {Baden-Baden},
series = {Praktische Philosophie},
volume = {56}
}