@INPROCEEDINGS {PYHASSEaNewSoftwareToolforPartiallyOrderedSetsExampleRankingofContaminatedRegionsintheAlps2008, author = "Voigt, Kristina and Br├╝ggmann, Rainer and Schramm, Karl-Werner and Kirchner, Manfred", title = "PYHASSE a New Software Tool for Partially Ordered Sets Example: Ranking of Contaminated Regions in the Alps", booktitle = "Shaker Verlag", year = 2008, editor = "Andreas Moeller, Bernd Page, Martin Schreiber (Eds.)", pages = "631-636", publisher = "Shaker Verlag", note = "ISBN 978-3-8322-7313-2" }