@Incollection{hotho2003okutm, author = "Andreas Hotho and Steffen Staab and Alexander Maedche and Valentin Zacharias", booktitle = "Text Mining. Theoretical Aspects and Applications", publisher = "Physica-Verlag/Springer, 2003, pp. 131-152", series = "Series on Advances in Soft Computing", title = "On Knowledgeable Unsupervised Text Mining", year = "2003", }