Jörg Diederich Wolf-Tilo Balke Uwe Thaden Demonstrating the semantic growbag: automatically creating topic facets for faceteddblp. 505 2007 conf/jcdl/2007 JCDL http://doi.acm.org/10.1145/1255175.1255305 db/conf/jcdl/jcdl2007.html#DiederichBT07