Robert Jäschke Leandro Balby Marinho Andreas Hotho Lars Schmidt-Thieme Gerd Stumme Tag Recommendations in Folksonomies. 506-514 2007 conf/pkdd/2007 PKDD http://dx.doi.org/10.1007/978-3-540-74976-9_52 db/conf/pkdd/pkdd2007.html#JaschkeMHSS07