"BibSonomy is run by the Knowledge & Data Engineering Group of the University of Kassel, Germany. This system is intended to support everyone, but in particular researchers, in sharing bookmarks and bibliographies. One main reason is that we have to deal with bibliographic data all the time, needed a more coherent way to manage our bibtex data. Another - even more important - reason for setting up BibSonomy is that social resource sharing systems are very popular nowadays, but do still lack theoretical foundations. Our aim is to tackle the research challenges that arise around systems like BibSonomy, and to provide more sophisticated support for tasks like browsing, searching, ranking, and community discovery."