Benz, D.; Hotho, A.; Jäschke, R.; Krause, B.; Mitzlaff, F.; Schmitz, C. & Stumme, G. (2010), 'The social bookmark and publication management system bibsonomy', The VLDB Journal 19 , 849-875 .
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Social resource sharing systems are central elements of the Web 2.0 and use the same kind of lightweight knowledge representation, called folksonomy. Their large user communities and ever-growing networks of user-generated content have made them an attractive object of investigation for researchers from different disciplines like Social Network Analysis, Data Mining, Information Retrieval or Knowledge Discovery. In this paper, we summarize and extend our work on different aspects of this branch of Web 2.0 research, demonstrated and evaluated within our own social bookmark and publication sharing system BibSonomy, which is currently among the three most popular systems of its kind. We structure this presentation along the different interaction phases of a user with our system, coupling the relevant research questions of each phase with the corresponding implementation issues. This approach reveals in a systematic fashion important aspects and results of the broad bandwidth of folksonomy research like capturing of emergent semantics, spam detection, ranking algorithms, analogies to search engine log data, personalized tag recommendations and information extraction techniques. We conclude that when integrating a real-life application like BibSonomy into research, certain constraints have to be considered; but in general, the tight interplay between our scientific work and the running system has made BibSonomy a valuable platform for demonstrating and evaluating Web 2.0 research.

Benz, D.; Eisterlehner, F.; Hotho, A.; Jäschke, R.; Krause, B. & Stumme, G. (2009), Managing publications and bookmarks with BibSonomy, in Ciro Cattuto; Giancarlo Ruffo & Filippo Menczer, ed., 'HT '09: Proceedings of the 20th ACM Conference on Hypertext and Hypermedia' , ACM, New York, NY, USA , pp. 323--324 .
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2007

Jäschke, R.; Hotho, A.; Schmitz, C. & Stumme, G. (2007), Analysis of the Publication Sharing Behaviour in BibSonomy, in U. Priss; S. Polovina & R. Hill, ed., 'Proceedings of the 15th International Conference on Conceptual Structures (ICCS 2007)' , Springer-Verlag, Berlin, Heidelberg , pp. 283--295 .
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BibSonomy is a web-based social resource sharing system which allows users to organise and share bookmarks and publications in a collaborative manner. In this paper we present the system, followed by a description of the insights in the structure of its bibliographic data that we gained by applying techniques we developed in the area of Formal Concept Analysis.

Jäschke, R.; Grahl, M.; Hotho, A.; Krause, B.; Schmitz, C. & Stumme, G. (2007), Organizing Publications and Bookmarks in BibSonomy, in Harith Alani; Natasha Noy; Gerd Stumme; Peter Mika; York Sure & Denny Vrandecic, ed., 'Workshop on Social and Collaborative Construction of Structured Knowledge (CKC 2007) at WWW 2007' .
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2006

Hotho, A.; Jäschke, R.; Schmitz, C. & Stumme, G. (2006), BibSonomy: A Social Bookmark and Publication Sharing System, in Aldo de Moor; Simon Polovina & Harry Delugach, ed., 'Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures' , Aalborg Universitetsforlag, Aalborg , pp. 87-102 .
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Social bookmark tools are rapidly emerging on the Web. In suchsystems users are setting up lightweight conceptual structurescalled folksonomies. The reason for their immediate success is thefact that no specific skills are needed for participating. In thispaper we specify a formal model for folksonomies and briefly describe our own system BibSonomy, which allows for sharing both bookmarksand publication references in a kind of personal library.

Hotho, A.; Jäschke, R.; Schmitz, C. & Stumme, G. (2006), Das Entstehen von Semantik in BibSonomy, in 'Social Software in der Wertschöpfung' , Nomos, Baden-Baden .
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Immer mehr Soziale-Lesezeichen-Systeme entstehen im heutigen Web. In solchen Systemen erstellen die Nutzer leichtgewichtige begriffliche Strukturen, so genannte Folksonomies. Ihren Erfolg verdanken sie der Tatsache, dass man keine speziellen Fähigkeiten benötigt, um an der Gestaltung mitzuwirken. In diesem Artikel beschreiben wir unser System BibSonomy. Es erlaubt das Speichern, Verwalten und Austauschen sowohl von Lesezeichen (Bookmarks) als auch von Literaturreferenzen in Form von BibTeX-Einträgen. Die Entwicklung des verwendeten Vokabulars und der damit einhergehenden Entstehung einer gemeinsamen Semantik wird detailliert diskutiert.

Hotho, A.; Jäschke, R.; Schmitz, C. & Stumme, G. (2006), Emergent Semantics in BibSonomy, in Christian Hochberger & Rüdiger Liskowsky, ed., 'Informatik 2006 -- Informatik für Menschen. Band 2' , Gesellschaft für Informatik, Bonn .
[Volltext] [Kurzfassung] [BibTeX] [Endnote]

Social bookmark tools are rapidly emerging on the Web. In suchsystems users are setting up lightweight conceptual structurescalled folksonomies. The reason for their immediate success is thefact that no specific skills are needed for participating. In thispaper we specify a formal model for folksonomies, briefly describeour own system BibSonomy, which allows for sharing both bookmarks andpublication references, and discuss first steps towards emergent semantics.

Hotho, A.; J�schke, R.; Schmitz, C. & Stumme, G. (2006), Information Retrieval in Folksonomies: Search and Ranking, in York Sure & John Domingue, ed., 'The Semantic Web: Research and Applications' , Springer, Heidelberg , pp. 411-426 .
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Social bookmark tools are rapidly emerging on the Web. In such systems users are setting up lightweight conceptual structures called folksonomies. The reason for their immediate success is the fact that no specific skills are needed for participating. At the moment, however, the information retrieval support is limited. We present a formal model and a new search algorithm for folksonomies, called FolkRank, that exploits the structure of the folksonomy. The proposed algorithm is also applied to find communities within the folksonomy and is used to structure search results. All findings are demonstrated on a large scale dataset.