@INPROCEEDINGS{heyer-kdir09,
AUTHOR = {Gerhard Heyer and Florian Holz and Sven Teresniak},
TITLE = {Change of Topics over Time and Tracking Topics by Their Change of Meaning},
BOOKTITLE = {KDIR 2009: Proc. of Int. Conf. on Knowledge Discovery and Information Retrieval},
YEAR = {2009},
EDITOR = {Ana L. N. Fred},
PUBLISHER = {INSTICC Press},
MONTH = {October}
}