@incollection{TUW-141744, author = {Greene, Derek and Cunningham, P{\'a}draig and Mayer, Rudolf}, title = {Unsupervised Learning and Clustering}, booktitle = {Machine Learning Techniques for Multimedia}, year = {2008}, editor = {Cord, Matthieu and Cunningham, P{\'a}draig}, pages = {51--90}, organization = {Springer Berlin Heidelberg}, publisher = {Springer}, address = {Berlin Heidelberg}, isbn = {978-3-540-75170-0}, doi = {10.1007/978-3-540-75171-7} }