1. Havre, S., Hetzler, E., Whitney, P., Nowell, L.: ThemeRiver: visualizing thematic changes in large document collections. IEEE TVCG 8(1), 9–20 (2002).
http://dx.doi.org/10.1109/2945.981848
2. Liu, S., et al.: TIARA: interactive, topic-based visual text summarization and analysis. ACM Trans. Intell. Syst. Technol. 3(2), 25:1–25:28 (2012)
3. Dou, W., Wang, X., Chang, R., Ribarsky, W.: ParallelTopics: a probabilistic approach to exploring document collections. In: VAST 2011 (2011)
4. Collins, C., Viegas, F., Wattenberg, M.: Parallel tag clouds to explore and analyze faceted text corpora. In: VAST 2009 (2009)
5. Lee, B., Riche, N.H., Karlson, A.K., Carpendale, S.: SparkClouds: visualizingtrends in tag clouds. IEEE TVCG 16, 1182–1189 (2010)