@article{DBLP:journals/ws/GolbeckMU08,
  author    = {Jennifer Golbeck and
               Peter Mika and
               Michael Uschold},
  title     = {Introduction to the special issue on the Semantic Web Challenge
               2006 and 2007},
  journal   = {J. Web Sem.},
  volume    = {6},
  number    = {4},
  year      = {2008},
  pages     = {241-242},
  ee        = {http://dx.doi.org/10.1016/j.websem.2008.09.001},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}