A copy of Jim Flanagan's Search Referral Zeitgeist was available at archive.org but has since been blocked. In the comments of a blog entryArchived 2006-04-26 at the Wayback Machine, a user identified as Steve Minutillo attribute the idea to Jim Flanagan, stating that Flanagan's site had such displays in 2002.
arxiv.org
Schubert, Erich; Spitz, Andreas; Weiler, Michael; Geiß, Johanna; Gertz, Michael (2017-08-11). "Semantic Word Clouds with Background Corpus Normalization and t-distributed Stochastic Neighbor Embedding". arXiv:1708.03569 [cs.IR].
Aouiche, Kamel; Lemire, Daniel; Godin, Robert (2007). "Collaborative OLAP with Tag Clouds: Web 2.0 OLAP Formalism and Experimental Evaluation". arXiv:0710.2156 [cs.DB].
Kaser, Owen; Lemire, Daniel (2007). "Tag-Cloud Drawing: Algorithms for Cloud Visualization". arXiv:cs/0703109.
Voss, Jakob (2006). "Collaborative thesaurus tagging the Wikipedia way". arXiv:cs/0604036.
Felix, Cristian; Franconeri, Steven; Bertini, Enrico (Jan 2018). "Taking Word Clouds Apart: An Empirical Investigation of the Design Space for Keyword Summaries". IEEE Transactions on Visualization and Computer Graphics. 24 (1): 657–666. doi:10.1109/TVCG.2017.2746018. PMID28866593. S2CID6570943.
Felix, Cristian; Franconeri, Steven; Bertini, Enrico (Jan 2018). "Taking Word Clouds Apart: An Empirical Investigation of the Design Space for Keyword Summaries". IEEE Transactions on Visualization and Computer Graphics. 24 (1): 657–666. doi:10.1109/TVCG.2017.2746018. PMID28866593. S2CID6570943.
Felix, Cristian; Franconeri, Steven; Bertini, Enrico (Jan 2018). "Taking Word Clouds Apart: An Empirical Investigation of the Design Space for Keyword Summaries". IEEE Transactions on Visualization and Computer Graphics. 24 (1): 657–666. doi:10.1109/TVCG.2017.2746018. PMID28866593. S2CID6570943.
Knautz, K., Soubusta, S., & Stock, W.G. (2010). Tag clusters as information retrieval interfacesArchived 2011-07-17 at the Wayback Machine. Proceedings of the 43rd Annual Hawaii International Conference on System Sciences (HICSS-43), January 5–8, 2010. IEEE Computer Society Press (10 pages).
A copy of Jim Flanagan's Search Referral Zeitgeist was available at archive.org but has since been blocked. In the comments of a blog entryArchived 2006-04-26 at the Wayback Machine, a user identified as Steve Minutillo attribute the idea to Jim Flanagan, stating that Flanagan's site had such displays in 2002.
Knautz, K., Soubusta, S., & Stock, W.G. (2010). Tag clusters as information retrieval interfacesArchived 2011-07-17 at the Wayback Machine. Proceedings of the 43rd Annual Hawaii International Conference on System Sciences (HICSS-43), January 5–8, 2010. IEEE Computer Society Press (10 pages).