@conference { OST*:2010, title = {Two-stage framework for a topology-based projection and visualization of classified document collections}, booktitle = {IEEE VAST}, year = {2010}, pages = {91-98}, publisher = {IEEE Computer Society}, organization = {IEEE Computer Society}, address = {Los Alamitos, CA, USA}, author = {Patrick Oesterling and Gerik Scheuermann and Teresniak, S. and Heyer, G. and Koch, S. and Ertl, T. and Weber, G.H.} }