@InProceedings{eswc2010heimEZ,
  author = {P. Heim and T. Ertl and J. Ziegler},
  title  = {{Facet Graphs: Complex Semantic Querying Made Easy}},
  year   = {2010},
  pages  = {288-302},
  booktitle = {{Proceedings of the 7th Extended Semantic Web Conference (ESWC 2010)}}
}